LHA-8 and subsequent (after Tripoli) revert to the well deck.
The big problem with the "mini-carrier" argument is that there is no AEW, no EA, no persistent surveillance and no tanking, which gets important when your jet has the fuel fraction of a clean F-16, or if you have enough jets on board to worry about a fouled-deck situation.
However, I believe the main reason for cutting off the no-well-deck class at two ships is that the amphibious function gets problematic.... You have a whole load of Marines, vehicles and gear and, mostly, small-cabin V-22s to get them anywhere.