Damage will be more or less equalized for all classes, and i am afraid ferals won't be bringing much other than mediocre damage and mediocre(if not bad) cc to 85 pvp.
Other classes will get and use new abilities, new cc's, new strategies while we will be reliant on old, oudated skills.
As I see, mortal effects are down to 10%, things will simply not die. Watched a couple 85 rogue vids, everybody just duels until infinity(premed recuperate, and energy regen for an upcoming shadow dance yay). Not sure how will it play out, how the game will evolve or degenerate.
Time will tell.
Feral for life.