having a rough idle issue on a 06 saturn vue 3.5 v6 (honda motor)

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i have an 06 vue with the honda 3.5v6 it has 74k i am the original owner i just had a ton of work done to this vue including timing belt kit(gates) water pump, spark plugs, belt,air filter throttle body cleaned changed one of the sensors, and new battery changed (this truck is babied) my problem is truck is now idling rough at standstill even when its cold and i let it warm up still idling eratic it has plenty of power when moving or on the highway accellorates smooth never had this problem before now its ony been a few hundred miles since this work was done! i bought it back to my mechanic he says nothing wrong with it and this is how idle is! and i have used this guy for years but i think he is missing something cause truck used to idle fine! so if theres anybody who could offer me any help with this! that would be great! please help! thanks nick in n.y.