I think the window size is fine. I think the problem with how fast and non-stop the ground game currently is lends itself to two problems.
1) Transition denial window slight to fast + how fast you can attempt transitions one after another (
one after another comes from a stamina depletion issue). If you make denials slightly easier to accomplish (
obviously rating based also because they are border line to easy currently) then you would see people getting stuck in certain positions for longer. This could also open up the light strike game of ground and pound where fighters such as wrestlers can do some work. This would help the shorter wrestlers who struggle with range in the stand up, ala DC or Mendes. It is still to difficult for good top control fighters to maintain a particular ground position consistently.
2) Perm stamina has to be affected by the ground game. It is absolutely silly that you can't grind out a win by tiring a fighter from maintaining top control and forcing the sub to carry your weight. It should work just like the stand up game where depending on how difficult the transition attempt will determine how much of both temp and perm is removed. Then the sub fighter will always incur a "bonus penalty" to temp & perm stamina reduction.
This is my vision of the ground game
dom fighter incurs no "bonus penalty", sub fighter incurs bonus penalty, based on position. Obviously positions which the top fighter places more weight on the sub. So positions like full guard, where many good BJJ fighters like to work from sub will still incur a penalty but very small but really heavy positions like full mount will be taking off nice portions of perm stamina when a sub attempts to get out of these positions. All numbers are pointless below but used just to give visual representation of what I mean.
Full Guard
Dom - none
sub - 2% stamina penalty
Half guard
Dom - none
Sub - 5% stamina penalty
Side control
Dom - none
sub - 8%
Full mount
Dom - none
Sub - 15% stamina penalty
I think "Grapple Advantage" is important, I think its critical in those "fast" split second moments where success of a move matters in real life BUT being able to slow the ground game down would rely heavily like in real life on how difficult it is to pass non-stop & how draining ground work is.
So my suggestion for a patch, don't increase the GA window, but instead work on slowing the ground game with denials & stamina toll.