Well we are complaining since the awakening update came or even longer and to this day they have not given us a single patch which would balance out the game a bit. Yeah the last patch making Destroyer shield breakable is nice atleast some kind of nerf but not every class can do that and their red spin still gives to much defense making them still way to strong as you mentioned.
Very simple:
Blade master: No untargatable
Destroyer: Increase Cooldown of Red spins so he has cd atleast for like 8 sec after Red spin.
Summoner: Rather needs an additional CC i feel like they are to weak right now.
Force Master: Tab walk needs a bigger CD so they cannot 24/7 walk in immunity or make T-Pose stunable
Kung Fu master: Its fine as it is
Assasin: Simply make their tab godmode stance stunable and increase cap time in beluga atleast 1 sec above what his C skill gives
Blade dancer: Is a hard topic in 6v6 i think its fine but 1v1/3v3 its totally broken. Maybe give shields a slight bigger cd by 2 sec ?
Warlock: Double aerial again but with the dmg of BM third aerial. Currently it has no offensive.
Soul fighter: Just optimise the washing maschine it gives lags af.
Gunslinger: a bit more mobility by decreasing Hook CD cause outside of 6v6 it dies due to no iframes.
Warden: Blade ward needs more CD so you are without for atleast 8 sec just like Des.
Archer: 1. make it possible to stun him while he airs. cant even save you unless you have a fm frost or whatever. 2. reduce the distance he can aerial you from
3. for light make his get up "1" breakable. Currently its as strong as a tab escape which means they have 3 tab escapes. A class which is super hard to stun in the first place.
Astromancer: The first class i dont think needs balance patches. Its litterly a fire fm but with slightly better defence and a bit less damage.
I have pvp exp with the following: BM, Destroyer, Summoner, FM, KFM, Sin, BD, Warlock, SF, Gun, Warden,