Finding those last 2 on diamond drop 2 is the nice cherry on top of the solve that I feel like this one is missing, unless we have not found some sneaky cut yet.
Both of the levels solve very similarly: find the right preliminary sequence of moves to not block yourself off and then move all the right blocks to the exit. However, in this one you're given so many ordering possibilities that you'll pretty much end up at 78 every time.