Resolve is working, the only time you can be killed while stunned currently is when the enemy team has a big numbers advantage on you, which strangely can happen a lot in huttball.
mostly you can take two stuns before you resolve is full, yes only two stuns, however you can take up to 3 or 4 snares before it fills up, which can lead to the idea that you have lost control of your character which you really haven't(just movement which can be bad enough standing in the fire in huttball ).
A good way to counter dying so such things is situational awareness really, maybe I am lucky being tank speced Jugg, but I will wait with my pvp trinket till I have full resolve then use it never before.
Just a last losing statement, if you get burned down while stunned and you are outmanned 2>1 it's totally fair that you never get out of that stun if those two players have any kind of idea of how to play.
Teamplay in this game is to be regarded very highly.