since there are 4 different characters in every zombies map, i think it would be pretty cool if each character had a different skill than the others. It could be like every character would have their own special ability or special characteristics that differ from the rest.

for example:

Power - this character would have more strength the others. they could have a stronger knife that one knife zombies up until a certain round then it goes back to normal. they could take 3 hits to go down, or 6 with juggernog. explosive would be stronger, and power ups would last longer if collected by this character.

Athletic - this character would be faster than the others. they could run faster than others. revive other people faster. and even reload faster, but it should be like in between normal reload and reload with speed cola. they could also knife faster and have faster fire rate.

Technical - this character would be more handy with build-bales and anything electrical.
they could hack or turn on certain things needed through out the game, like turn on traps with out being bought. they could be able to turn on perks or machines that needed power for limited use.

Hunter - this character would be good with weapons. they could carry more ammo in their guns than other characters. the bullet damage could be higher. they could have a stronger pistol and knife in the beginning. they could also carry more grenades and other carry on items. the accuracy could be better and they could have a permanent dead shot daiquiri ability like the one in tranzit.

these are just my ideas that i thought would be pretty cool if they actually did this. it would add a little more fun to the game, they could use these abilities to affect the Easter eggs so that only certain characters could do certain things. it would make it more interactive.

let me know what you think, leave any feedback!