To me this breaks the immersion of your character in the world. When you go through the PvE side of things, it makes sense that your get more skills, gear etc as you level. Every time you log in, and everything you do is a continuation of this slow and steady progress. You character is and has exactly what you earn through the choices you make in the world.
When you can instead create a character and instantly have every ability, the best gear etc. and travel straight to endgame pvp, it cheapens the value of the world you play in, it makes it irrelevant. It no longer feels like "your character" that you traveled with through many adventures, but rather just some generic toon created by the computer that you happen to play.
This also seems bad for the PvP gameplay itself, as you will have players running around who have zero experience playing their profession.
If you want to give players all the same gear to make it a level playing field then OK, but IMO make them wait until level 80 to get that. Have them go through the world, learn how to play their profession, develop a connection with their character, with the reward of a great PvP experience waiting for them at the end.