in transformers 1, the decepticons were only seen talking to each other during megatron's escape from hoover dam. and the conversation only took place between megatron and starscream for just a few lines.
the autobots were shown having a chat with one another in several scenes. the decepticons need similar scenes among themselves. i really liked the verbal quarrel that went on between starscream and megatron in the 80s series. there should be a scene in transformers 2 where the decepticons are having a chat with each other while they plan something sinister.