I agree about rotation rate being the most important. “Speed control” is driven largely by that rate: too slow and you’ll be fast, too rapid and you’ll be slower than you want by the end of the manoeuvre. During rotation, the speed will increase from Vr to V2 and on to whatever is normal for your type. Playing around with the rate while chasing airspeed is not generally a manufacturer recommended technique; a constant rate rotation to an initial pitch attitude is.