"so let's set this straight, so how i see it... Pyros want the update for some bug fixes, (and in my eyes, one of 'em's a buff;#2 of their primary bugs on their beautiful site (http://frompyrowithlove.com/) because the flamethower gets more range, not only helping pyro, but giving people some second thoughts a fightin' i'm at close range! but that's just me) and the bugs are pretty bad, so that's a reason.
Heavy's want the update for class variety because of his stale gameplay(new weapons!) with the low amount of viable weapons for gameplay, and not a lot of synergy compared to pyro."
so, pyro voters are saying that pyro has some serious problems, and not gonna lie, they're big and need to be attended, BUT WITH A FULL UPDATE? really? i know they're bad, but i don't think they need a full-on update released immediately on the problem!maybe a patch, because that update adds weapons, and pyro really doesn't need weapons(or at least in my eyes) because of all his synergy between them; all his weapons can work together like a well oiled machine!
the flamethrower, alongside the degreaser, can work wonders with the shotgun, reserve shooter, flare gun, and scorch shot! and the melee's are incredible with this, the axtinguisher, the backscratcher, and the powerjack can all be used to a great extent, yea, they're not perfect, but they all work wonders with combos like the puff-n'-sting! they allow the pyro to pump out great deals of damage, almost like they're meant for each other!* (* phlog and manmelter here, they literally help each other out, with the only downside being no downside)
and that doesn't mean that the other weapons suck, or in this case "blow" either! the backburner is a ranged spy knife, and punishes players that try and turn around to run away! and the phlog. is a crit machine! the detonator allows for access the pyro never had before, the manmelter works dreams with the phlog. because of the fact that it can extinguish teammates for crits without wastin’ ammo, and the third degree is, i think the only direct upgrade in the game now! (i know not all of the weapons are here, but you get the idea) he, she? ah what ever, IT has some bad weapons, i can guarantee that every class has its crummy weapons, but at least pyro can make 'em work well in some way!
pyro also has a large array of subclasses, like the pybro, the ninja pyro, and the spawn camper/crit farmer, and a couple of others that i can't think of right now.
Heavy voters, on the other hand, are wanting the win for weapons; a key to end the staleness of the class! heavy right now is a drag, and that's because there's not alot of variety for his armory: the stock and the tomislav(and the last one's questionable), the sandvich, and the GRU and fists o' steel, and that's because the others are kinda bad:
the brass beast is too slow to be effective, natasha is questionable, as it's situational, ie. if there's no heavy-medic combo on the opposing team, and you're bein' pocketed, it works wonders, but if there is, you can't fight them alone, as the dps is too low for a victory. and the huo-long-heater wastes too much ammo per second, thus requiring the user to either roam for ammo packs, or turtle a dispenser! literally all the other miniguns are very, VERY situational.
and don't get me started 'bout the secondary's, the shotgun takes too much time to take out due to the wind-down time, and the family business goes with this as well, the dalokohs bar is a worse sandvich that recharges fast, how can you help your attacked medic with a small med pack? when he's almost dead and is on fire? the sandvich fixes that and allows for a jumpstart for the partner! the steak is just for melee builds, because you only get to use minicrit melee for about 40, maybe 30 seconds? at most, and you take increased damage during that time; think modified crit-a-cola. again, they're not all bad, the family buisness works great with the fatscout, and the steak's great with the melee class
and the melee's, oh the melee's, the eviction notice is a crummy GrU with its own pros and cons, the holiday punch is a hoovy only weapon, but can work wonders with the kritskrieg, should you actually get a pocket med. the warrior's spirit is a roll o' the dice; do you get 50 health per hit? or do you lose over 100 in a second? all in all, it should stay in medieval mode. the KGB can do some damage, you know, if you can actually keep up with the person you're punchin', and if you actually kill 'em! the GrU can get you places, but you'll die pretty quickly if you enter combat shortly after you put away the flamin' fists for that minigun. the fists of steel reduces all ranged damage, but if you encounter a demoknight with 'em out? you're toast!
and another thing, there's not alot of syergy between 'em! the GrU can go well with the brass beast, and the steak with the warriors spirit to name a few, but not alot of others, but the subclasses, man! they've got the hoovies, the livin' sentrys, the engie pocket(hue-long-heater heavy with a sandvich helpin' the engies against the spys and other forces) and the comedy show!(holiday punch with the kritskrieg) to name some, sure some of these are not as known, or even heard of, but they can be pretty fun!
another thing, the winner's update will most likely be made up in a jiffy for the winner, so if the heavy wins, the new weapons will be had, aidin' the heavys, there'll be patchnotes; maybe a problem with the pyros'll be fixed by then! and good time all 'round, also, i feel like there'll be new weapons for other classes, pyro too! because it gets pretty darn cold up near siberia where he lives, so the pyro might get somthin' really, REALLY great at heatin' people to scorchin' levels real quick! if pyro loses, then there'll be a large period of time where the team can work on the problems effectively, taking as much time as they need to perfect every last detail, and in general work hard on the pyro's bugs
TL;DR: team pyro's WANT the update first, to fix bugs and issues, and heavy's NEED the update first, just to defeat staleness and help heavys with their problems
by the way, this is my first ever post, sorry if it's low-tier