Lumpy tickover - Yes, mines always done it...always. If the engine is warm then it will burble like a sl*g at the lights. Period. Seems better with Optimax over other high octane fuels. Ive not yet had the chance to try Tescos new 99RON though.
Cold hesitation - Yep. Same again. Mine does it sometimes when the engines stone cold. It doesnt have to have been a cold night - in the recent warm spell its still done it in the morning (actually its been worse in the mild weather). Enough for the GF to notice when she wasnt even driving, put it that way.
Flatspots - No not really. Beyond knowing that its just a mildly well tuned NA (naturally aspirated, kids) 2.0 16v and not expecting big capacity levels of grunt, it feels fine. Comes to life over 4000rpm...starts to pull hard from 5250 up to around 6750-7250. Try turning off the ESP, as it may well be having its own ideas about power delivery, especially exiting bends. This is open to debate though.