Honestly I don't get this. First off, in lower elo goats isn't even a problem. There are also plenty of other viable comps and variations of goats floating around that work really well. Also, goats requires a lot of coordination to be successful which is when the game is it's most fun imo - when you coordinate perfectly with your team. If everyone really just wants to go back to dive every game then that's fine I guess.
It would also be really bad for the OWL if this role lock would be for OWL only. If they think viewership is bad now, it's going to get worse when people don't get the same experience at home.
Personally, I have no problem with the current meta. It has been shifting slowly lately and blizzard is trying to make changes that dont just break the game. And for people complaining about metas, every game had one get used to it.