They haven't got pvp right in 10 years, which means one of two things. One they're just retarded or two they've never been trying to balance pvp like they say they are which kind of points back to one lol.
Also just going to throw this out there remember cata? Yea that had the exact same idea and failed hard. Triage healing? Check. Try and boost hp way over dmg check. The whole "but they're redoing everything" is giving you hope but remember the last 10 years. They always talk a good talk pre expansions then fail hard in the betas. Every x.0 patch has been terrible for pvp for 10 years you think they will get things right in beta this time? After the mess holinka made every single patch of mop? These are the same people that let the stampede bug go all beta and months into live lol.
As a side note it seems they've been failing so hard at the alpha that beta has been delayed a lot doesn't really speak well for this either. And to those who would say we don't know if its delayed or not, either they have been lying to us since blizzcon or they messed and got it delayed again either way is bad. Yes they don't "promise" anything but sure led us on to think it was farther along which if it wasn't that's lying and if it was it means they screwed up.