Have u sorted out the problem ?
i've recently got city AT 2010 and thou the tuning and plug change wasnt from Honda (which shud've been !) i feel like pick is not that responsive as i want, may b i give too much throttle... but now im thinking to go to Honda service center and get it checked, just for the peace of mind.
u said the engine oil was changed, have the plugs too ? & as someone pointed out, was throttle body cleaned / tuned ? after checking all that, u can narrow down the 'to-dos' ...
Good luck ...