The fact that Lvl 50 - Warzones will take time to start will solve itself with more players reaching Lvl 50. So that will be an temporary issue at best. In the meantime, all players that roll new chars and also want to do some PVP while levelling up still have the ability to PVP because anyone between Lvl 10 and 49 is in one bracket. So i think this is a good solution, especially for new players that need that phase to gain experience in PvP.
Besides of that it still amazes me that even on the PTS-Forums people keep getting at each about who is more correct on "what people want to play" and who has to "go back to WoW". This is a test server, it's intended for testing new stuff and the forums are intended for comments on actual changes and maybe suggestions for future changes. There will always be "pure" PvP'ers, "pure" PvE'ers and some that do both. All of them belong in this game and should have their fun. So these discussions should be more about "if you change X for PvP, it may cause Y for PvE, how about changing it that way?" instead of "go back to WoW if you want to do PvP/PvE/whatnot". Like in... having a meaningful discussion and all that. Shouldn't be that much of a problem...