I say yes due to a few things.
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talents, it is easier to prune the talents to make pvp more balanced, than to have the old talent system.
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due to the pruning you can easily monitor what spec is the flavour of the month.
those 2 things unfortunately makes a huge impact on pve, to the extent you have no real choise, now I am not saying that the old classic talents where perfect, far from it, but it had huge potential, and would only have needed a tweak to make them more intresting, maby a smal prune and remove talents that where totaly usless and make them base line instead, like the 1% buffs to dmg and things.
but still keeping it so you can choose what skills to pic.
like a Bm hunter can choose to use talents from both surv and MM if so wanted to, though offcourse every choise should impact the gameplay, like you can not have both aimed shot and chimaera shot for example, to atleast to some extent keep things balanced, just an example.
but what about pvp then, yes, random bgs works as now, you go in whit what you have equipped.
but arena and rated bgs, gets changed, want to do rated bgs, you choose from preset chars, and on top of it, all teams have to have same classes, for example this month you can choose from warrior, druid healer, priest healer etc…
Arenas the same, 2 vs 2 this month warrior and priest, 3vs3 monks healer, DH dps, and dk dps. and so on.
theese all changes from eighter month or on weekly bases, on top of it, all gear is preset also, and you can not change gear at all.
random bgs again you get items you can buy for pvp, and from rated you get honor to buy gear, but this gear can only be used random bgs, and are not much better than what random bgs gets, on top of that for rated you get transmog items and other items you can use.
atleast for me buy doing this, there is no no need to nerf talents to same extent as now, becuse it would never affect rated bgs anyways, considerin every team is the same.
would some hate it, probably but it would be fair for everyone, and random bg people can lol arround whit what ever they want to as now.