Sweats always have had a clear defined rules because the community was small and there was only 1 playlist to even sort of make things work. It was hard enough to find people to play with, so making rules so that everyone was on the same page made things run as smooth as they could. Tournaments have always decided on what specific rules they would use.

Once RoI hits, private matches will change up everything. It will be so much easier to play private games, having default rules to play with won't be a necessity. There will be more options than skirmish 3v3, and that may allow for different playstyles. In game settings allow to choose whether to enable LL, which would provide a more official way simply say, "no matador." There will be more tournaments, which means as long as a rule set is popular, there will likely be people playing it.

I've had qualms about the excessive bans in sweats. I think the process behind determining the bans has been a deterrent to new people venturing into sweats, and have not done a good job explaining why each rule is in place. But at this point, I think private matches will take care of things. Private matches will make it easy enough to play with people that it will be easy to play with whatever rules you want, and there will be enough tournaments that we will see a variety of game types and rule sets.