Really not impressed here,
Both shadow and vanguard tanks distinctively lack cooldowns when compared to guardians. Vanguard tank tree needs more survivability or there will continue to be a distinct lack of them in both PvP and PvE.
Furthermore, the use of sonic round as a threat dump and the loss of diversion is awful. I was appalled earlier this year when I found out that the ability named CHALLENGING CALL would be turned into a threat dump, it's incredibly lazy on BW's part as I feel it shows they can't be bothered putting a simple animation in.
As has already been stated, the "new" abilities such as shockstrike sound dumb and should just be a passive buff onto stockstrike.