Too many variables, but I think what is possibly helping seeing more/better 4+ FP's is because of:
1. It was a minority taking advantage of the "loophole" and people blowing it out of proportion on these and other message boards.
2. 3rd Track at TSM for HS in combination with people seeing HS as a half-day park.
3. 3rd theater for Soarin' at Epcot and like HS, some people see the attraction side of Epcot as a half-day park.
4. Frozen at Epcot is taking a lot of people away from TT and Soarin'.
5. NRJ and FOP opening up (and the associated super-long lines) are taking people away from other AK attractions as well as other Parks.
6. Overall crowds have been down when compared with the same time in previous years.
I bet if you looked over the next 60 days on
MDE for FP availability (and definitely next 30 days), you will probably not find any availability for (but then again, maybe you will as we are heading into Sept and schools are back in session; if it were back in June, you wouldn't find anything of the below):
Epcot: TT, Frozen, maybe Soarin'
HS: TSM
AK: Obviously NRJ and FOP
MK: Space, Splash, 7DMT, TMR?