I would have liked light armour for my engineer, rather than playing through the game in the heavy armour my soldier had.
I'm torn on the whole issue really. I think for realism if nothing else the whole squad ought to be armoured when in battle, casual when not. Combat is not casual. It'd also be good to be able to fully customise each characters armour as you can with Shepherd.
However the game is already two disks, the cutscenes are already filmed, it's not going to happen. I don't think they can just change the costumes in the cutscenes, even in Mass Effect 1 when Ashley's white and pink default armour is only a colour change away from her later armour, she's still in her default kit at Virmire.
Also they pushed the boat out with two disks of content, while the PC version could have any amount of costumes and so on they'd never knacker themselves by offering an inferior product on the console. It's also a very hard game to mod, which would have been the other avenue.