Yes..
It speculated that it is just a cheap excuse not to do it (at least not now)
Actually one can see a rising tendency of the complexity in their *to-do* aircraft list in an abstract way. (at least I do)
Ka-50 - base stuff: single seat, sight system, something that can be called an MFD, base code, detailed flight model
A-10C - new stuff: night fightning capabality, RWR
AH-64A - new stuff: two seat code
Mi-24V - new stuff: troop ferry code in a relatively simple, but highly popular aircraft (at least compared to the preceding planes)
F-15C/Su-27 - new stuff: AA missile and radar code
MiG-29 - new stuff: basic AG ops
F-16 - sophisticated AG radar + all the stuff made already (excluding: two seat and troop carrying)
In this way they leave the most hard to do stuff the last ...