PES would not carry the same licence structure as FIFA but due to Fifa's licencing then releasing after the first transfer window was always on the cards.It is one reason but it is not a priority that you need to stick to, PES for instance would release marginally earlier than FIFA and still not have the transfers from the last few weeks of the transfer window. FM’s in a whole different ballpark I suppose with absolutely no sort of competition, they can do whatever they want.
Kinda reminds me of a certain cricket game.