I can totally flawless "Need You Tonight" on expert Pro Keys.
What difficulty are you playing? I'm mostly doing Medium. No way am I doing expert on any song that isn't retardedly simple just yet.
What's the difference between pro drums and the "old" blue and green cymbals? I only ask because my Ion kit is packed up due to space constraints, so I've only been using my RB1 kit. No cymbals. pro or otherwise.