Interesting - I recently had a 330xi automatic loaner car and came away with very similar observations as yourself.
The pedal was very touchy - Part of me liked the instant throttle response but admit it was a bit jerky not being used to it. I guess I'd get used to that. I could really feel the extra torque off the line
I also noticed the 330 to be a bit noiser in the cabin - I'm attributing this to the engine and exhaust note, which IMO sounded much different than my 325i. The 325i has more of a droning, humming sound, where the 330 sounds like it has more grunt - I hate to say this but the 330 sounded like a Japenese V6
In the end I was happy to get my 325 back since it's a manual - no step for me, but I'd be happy to trade my 2.5 liter for a 3.0!