The car will idle high until your tuner can make the adjustments. Mine had a very high idle, as the IAC control was way off.
Personally, I took the weight savings with the cruise control delete :D
Parking Lot Hero
2008 WRX daily driver
2003 ZX3 23D Autox Car 42 FSP
"Hella Functional - Raced, Not Hard Parked"