I agree, a mode to set up custom scenarios for practicing different skills would be a big help.
A lot of the stuff on this list were things we didn't fully discover until I sat down with a buddy in PNO, and we spent the whole time really exploring the different animations, how they branch, and what exactly different combinations of buttons and stick movements do in different situations.
We learned that a lot of those right stick defensive cut off maneuvers are pretty quick animations, almost equivalent to holding down R2 but do not use any turbo; with a decent defender and some practice you can pretty effectively defend on ball using only the sticks and only pressing L2 when you think they will shoot.
I am now beginning to think that many of the complaints about CPU defense (perfect defense,warping,pushing people out of bounds with no foul,etc.) is due to the CPU using this "right stick method" for defending, and thus being able trigger some pretty fast and effective animations pretty much on command.