well start with giving back abilities.. change existing ones to be less retarded(aka stupid procs and instant damage shit or shit like subterfuge), do something about retarded mobility some classes have.. do something about consistent damage outside of cds, its super low for alot of classes.. makes the game scripted and boring
then remove pvp talents, this game dont need no PVP specific talents, its only making it more confusing to alot of ppl, make abilities baseline(like earth shield, amz, dark sim etc)..
also stop with this template bullshit.. gear not mattering in an mmo? what kind of ignorant bullshit is that? get rid of it, bring back vendors with pvp gear, let ppl decide how to build their characters, some pve gear is fine with pvp too if its not gamebreaking bullshit like legendaries etc(if those are in the game just nerf them in pvp, or dont make them retarded as fuck), to make duels/wpvp less retarded think about resilience gear(or baseline res like in mop) and paired with removal of templates/scaling that should fix the problems
stop bothering so much about all the balance bullshit.. the game never gonna be balanced, but it can get super fucking boring without all the shit i mentioned above