Eh, the 3.0L is all i need it to be, coming from a Stage II 07 Cobalt SS SC, it's slow, but the 1/4 mile on this thing is 16 seconds or something, and 7.0 seconds to 100kph. So it's nothing fast i need anymore, the engine is good. I think what people are defining as "sluggish" is the seemingly delayed throttle response. I know why it does that, (so your not jerking your drink or head around) but people immediately say "it's slow". They just want the vehicle to snap going when they press the throttle.
Besides, it's a whole different beast in Sport mode, and the SportShift mode is absolutely great.