Honestly, I can't really see where you are coming from here. Jailbreak is with out a doubt, not a gamemode which should have a degree of randomness in it's combat.-1 random crits are fine especially for jailbreak taking away crits will make it even harder for reds to kill Blu since the blu got the better advantage with guns against reds and then there will be no point of rebelling.
all you will see is all players go to the blu side because random crits have been taken and this will cause jailbreak less fun.