First, the main goal with this set was to get the cpu somewhat competitive. They got neutered somewhere along the way from 07 to 08! Also, I try to get things working as much as possible without any player edits.
For the most part the cpu seems to be responsive. I big problem I found was their plate discipline slider. At default the cpu batters are very patient and were taking too many pitches. They were always ending up in the hole which resulted in them either striking out or swinging at pitches to stay alive and hitting flubbers. Now they are swinging earlier in the count and still taking some pitches. I also flattened out the movement from the human pitchers so the cpu was not fooled as much. As far as contact made by the cpu, I wanted to make sure that their contact was positive as much as possible, that is why I dramatically increased their hit quality. I only raised their power a small amount because of increasing the other so dramatically.
As far as the timing window goes, I had high hopes for this but I do not find it to be a dramatic impact on the game. My thinking was if we reduced it, we would be able to reduce the amount of opposite field hits by taking away that time slice that caused late contact. It did not really do that. To me all that it seems to do is track close hits(as far as being fair or foul) left or right on the field of play. It appears to have a better affect in the positive range. I maxed it for the cpu to give them any possible advantage! It does not affect any swing and miss type contact at all.
As far as plate vision goes (besides the crappy name) I view this as the actual contact slider. In the - range it adds a little challenge for the human player to be true with their swings and take away some of the bonus contact out of the zone.
Let me know if I missed anything!