okay so this is all my opinion and understanding so I'd really rather not have to put up with any bullshit over this but this is how I understand it
Tanks- Yeah it's not great, for a while we are gonna get shit stomped cause we can't move the tank which means zerg ravagers take us down and everything protoss can just jump in. Now whilst this has always been a problem it's worse against protoss becuase of immune adept shades. If the protoss wants to he can just adept shade in on a few tanks and giggle as we either unsiege allowing him to engage on our defensive position, or we friendly fire ourselves to hell....... allowing them to engage on a defensive position with impunity. However tank drops don't fix these issue they provide a weird and frankly gimmicky work around, as long as Blizz HAVE to give us the tank drop they also have to give everyone else the capacity to stop tank drop harrass. Ultimately a siege tank is supposed to be a setup and fuck you unit, the enemy are not supposed to come rocketing into them. so overall I'm happy with the change, the tank drop is gonna get removed, the damage buffed and either our meta will shift to allow us to keep taking the enemy on or as Nathanias said, our winrates will plummet and action will have to be taken.
Liberator range- It's extremely effective and easy to pull off and a nightmare to handle if you get unlucky with the positioning. Playing archon protoss vs a terran last night the bastard found a spot I couldn't shoot him with stalkers and as such turned off my natural. But I'm gonna back down on this point cause I hate liberators with a burning passion.
Reapers- yeah I'm with you on this one, dunno why they added the K8 charge reapers were fine in their role before and now adding a couple to a late game comp in say marinetank v marinetank can prove helpful cause you can force a load of marines to miss a volley but honestly I have no idea how zerg are struggling vs mass reaper. the queens can usually shy off enough to get some roaches out and if they still get smashed out it's usually because the Terran went for a reaper all in instead and then yeah, the zerg should have some bloody work to do. I dunno I've tried reaper all ins and attacks vs zerg and been held off by queens and roaches and if I was intense enough- spine crawlers. But again I'm in a low 1v1 league so maybe someone higher can come along and correct me.
Final points- I'm against you here I reckon Terran is still pretty strong. Our potential for play is so much higher our liberator (fuck this unit with a burning goddamn stick i hate it so much) is really strong and we can essentially declare entire swathes of the map off limit. Once we get rolling our bio ball presents a major threat moving out against us without hard counter units is suicide and our liberators can make the situation suicide anyways. With the incoming damage buff siege tanks will take on a new role and totally shag roaches and stalkers so the yolo tactics shouldn't work too well with those units anymore. We are wise to zerg tricks now as well and to go back to my point about liberators, with the bunny build we pretty much completely screw zergs over. We place our ranged libby out of the effective range of a ravager and so the zerg has to build a spire and mutas which are countered by... liberators (fuck this unit.) So whilst all this is happening I don't think we are the weakest race, dunno who is at the moment but we can hold our own and we can push the enemy. Personally I can stand facing a zerg player, I can respect them, I can respect my loses to them ya know? I got out macroed I got out played- out positioned the list goes on I get my loss and I'm usually happy with it, take it onboard and improve. I hate protoss because I never feel outplayed. Disruptors in a large number can be effective vs bio (but seriously he blows his load at you just turn around leave then come back) colossi only work because we don't build the air to stop them earlier. but far and away storm is the most effective thing they have and I can't stand losing to it because the mistake is entirely mine. There was no play from my enemy, you don't "storm well" it's so easy and so strong as is all their micro. Blink micro (often held up as an equivalent to our splits) is draining on the ol'APM sure but it isn't hard, it takes no thought to pull off and that's why i dislike facing protoss so much. Ultimately though I think we are one of the stronger races at the moment but then I literally watched the terran streak in tournys recently and then disappeared for a while from the flu so what the hell do i know. I'd say the big thing we have on other races that makes people angry is our skill cap, we can do so much against an enemy doing so little and still lose and that's what makes people angry.
P.S. you think TvT is gonna be the same? imagine it right? you draw your new improved mega siege lines and then dickweed on the otherside of the map goes and deploys a libby (fuck that thing with a pike) on your tank... Now what smart guy? you can't save that tank! what if he gets more than one? you gonna rush your marines into that mega siege line? no the liberator is gonna fuck the matchup right up as it'll become even more about air control to a frankly psychotic degree. Honestly i loved the old siege line marine games with drops on the side, but how can you setup a line against an opponent using liberators? Skyterran vs Skyterran... gonna be so fun to watch and play!