I'm slow but i don't have issue being smooth on my Gen4. I come from a Gen1 though which is a !@#$ing lightswitch. The Gen4 is a pussycat.
You say you have issues keeping the tire down. This in my understanding points at poor/late throttle smoothness/roll on during exit.
Are you geared stock? I don't have wheelie issues in my Gen4 unless i whack it / get whiskey throttle, with the exception of some wheelie bumps and different grades. 1st gear i need to be smooth to keep the wheel down but it is definitely possible. I'm geared stock (currently, was geared like +4/5 in rear) with rear tire as far back as possible, running Kit ECU pushing 190ish HP to the wheel on pump gas.
Seriously if you're having trouble with wheelies, try turning the TC on. Stock TC1 will keep it managable, as will a smooth roll on. Your choice.