Everything.
Prowl should be something like the Autobot version of Spock. Logic is his God, and he doesn't really do emotion.
He's not an unstable, rulebook obsessed jerk that flips tables over every time he gets upset and he most certainly doesn't form Devastator's upper torso.
If IDW went back to awesome resources like the original tech spec bios and used the wealth of information about each character there they'd have all they needed but like the rest of the comic industry they seem more intrested in throwing in as many dumb ideas for cheap shock effect that they can than actually telling good stories with intresting characters.
I also think ending the war and constantly making parallels to problems we face in the real world is totally missing the point of Transformers. They're alien robots, not at all human, so they shouldn't be written as having human issues.
MTMTE started with a load of drivel about Cybertronian immigration issues and there was even a reference to bots making compensation claims. No action, just lots of bots standing around and grumbling. Swerve was the only cheerful character in but I'm betting he got arrested for it, probably by Prowl.
And Optimus Prime, the greatest Autobot of all, has apparently had a hissy fit, renounced his name and gone off into space on his own, presumably to have a big cry or something.
Sorry IDW, you're making Bay look good, something I can't support in any way,shape or form.