I dont think turning off the PCI will change anything as far as that goes.
I dont use the PCI (i used it so much in the past that i can still 'see' it) but i do use the feedback, which i think is important to look at. In real life, players have a good idea of exactly where the ball hit the bat, and will even use the mark on the bat to know exactly what happened. The feedback is our version of that.
I dont know exactly what could be going on with the PCI on yours. I did notice some funky things right after release, but one of the early patches must have fixed it. It did feel more sensitive as far as the up/down movement for early/late swings, but it doesnt seem as exaggerated to me now. I also noticed, and i believe even posted about it, left/right movement right after release, which seems to have gone away with some patch.
(I cannot speak for the latest patches, so whether it re-introduced some odd PCI movement that seemed to be fixed before, i dont know. I suppose since they did change the PCI a couple of times, it is possible they could have adjusted how it moves as well?)
I think timing up one wouldnt be too bad. It might give you the extra pop to increase your doubles output. My only concern would be increasing your Home Run rate too much, but given you are only at one per game, it could help that too.
The thing about your stats, is you are only missing one hit per game to getting close to where the real life pirates are. The other odd thing about your stats is all of those 13 extra hits need to be doubles. If you had one more double per game your hit type percentages would be approximately 1B 62%, 2B 21%, 3B 4%, HR 12%.
Of course we are talking about a very small sample size of 13 games, so things are likely to change anyway. But since we are mainly talking about the PCI i think timing up one may help.
Another option would be to lower both pitch speeds to 4. I think that could help as well.