Gok, I think you're being a bit too harsh on these guys. The line is called War For Cybertron after all, not War For Earth.
Ravage shouldn't look like a panther and the alt modes shouldn't look like cassettes - I just think of them as Cybertronian data packs.
You could also justify Ravage's bulkiness by thinking of it as armour.

I'm going to get roasted for this post aren't I?