Submissions to me still make little sense.
However i have now started to get better with Shogum, executing flying knees etc, still trying to master knees in the clinch though.
SO with far with Subs i have still decided the outcome is completly at random.
I was in full mount, and pounding and Chuck was dazed, you know the screen went grey, instead of finishing with GnP, i go for a sub...... Chuck rolls out and is on top of me!
I think, and i only think that the stamina gauge gives a better gauge of if a sub will pull off.
Also on 2p i may be onto something, ok i commit to the sub, and my brother is doing his thing to defend, i rolling the R stick one way. Now usually he breaks free everytime, so i experimented changing the rotatino of the R button from clockwise to anti clockwise!
Doing this secured me to sub victories, so that could be an answer right there!