I agree with you. I've brought up before that 2A+3T and 3T+2A get the same credit, when 2A+3T is in fact harder than 3T+2A. I agree that 3Lz+3T is much harder than 3Lz+2A, yet there's nothing but the BV of 3T vs 2A separating those two combos.(I am talking triples and primarily referencing the top girls competing at the junior level. )
My point is tacking on 2As is much easier to do than a +3T, so that's what these girls are opting for. The 1 point bonus doesn't offset the risk for them to put the +3T combos in the free program. And they don't put 2As in the last jumping pass, so in case of an error they can tack it on to a later jump.
I would assume 3Lz+2A+2A is slightly harder than 3Lz+3T, but not that much.
I don't think it'd be that difficult to gather a bunch of jump coaches, determine the difficulty ranking of all jump combos that can be currently performed, come up with a BV for each, and enter those into a database so that the tech panel can call them in real time.