I've noticed this in ROTF. Some characters have their ROTF abilities that they use in the movies. Optimus's increases his melee damage and in the movies he uses melee a lot knocking off peoples heads in the process. Sideswipe manually launches his blades at sideways and slows him down. In the movies Ratchet I see always takes these big hits on the battle field and yet stands back up. In the 1st and 2nd movie Megatron uses his fusion cannon twice and its lethal to anyone but Prime. Starscream could, I mean he's sort of a hit and run charater and it would explain why his weapons are so good. These are just guess's. These go for the movies, I know what they do in the game.