Is a combined engineering program better than a regular one?

How about 3-2 programs for students who may not be ready for college rigors straight out of high school? Perhaps 3 years at these colleges taking required math, physics, chemistry, etc and then continuing onto Engineering program would suit some students. Of course if a student isn’t motivated, they will fail whether it is at engineering school or before they get to it. I am interested in this for my son. He will do well at colleges with small class sizes. As an example, we visited Georgia Tech and our jaw dropped when they said as many as 200+ students may be in a Calculus class. That isn’t a recipe for success for my son. So, the thought about 3-2 programs or transfer program like RETP that Ga tech has.