Shield Bash is still best stun ingame because it has no CD and can be spammed untill out of TP if needed, now if it was oGCD it would need a CD for balance reasons thus removing ability to stun-lock from game and that would suck royally(specially in pvp). So lets leave SB as it is and focus on skills that are more clunkier atm like DV,Shield Swipe and Clemency for example.
