darn hammer ons!!! always softer than the original note... play less legatto! you can check the box for quantizing the release as well to prevent overlap. Also, if you insert the quantize effect, you can adjust the offset setting inside the quantize dialog box. Try -30 or or so if using the strumming keys for for an on top of the beat strumming effect. depending on sample latency, i adjust the quantize offset. staccatto strings may need the quantize offset set ahead even more when quantizing. whatever the sample needs in order to achieve correct timing in the end.

Yea I needed a staccato picked guitar sound with defined notes, and acoustic session just didn't like my fumbly recording which was originally sustained too (crappy cheapest digital piano).

I'm buying addictive keys soon too, I tried the demo and it blows true piano and my pianos sounds out of the water.

After you've recorded your MIDI track, go into each clip's properties and edit the start time to just a little earlier..  I've even bounced the whole MIDI track into one clip then slid the whole thing... just in case I need to 'undo' the offset to make edits (easlier to change one clip than lots of clips).

If you want to adjust the time offset on every note by the same amount, consider using process -> slide.
Negative values in slide will sound earlier, and positive values, later.
 

 
This will slide back a little less than a 32nd note.
 
When you select the data on the track, make sure to start the selection with the first clip (assuming the first clip is later than time 0).  You can do this by ctrl+clicking the first clip 2x.  Or just lasso starting with the first clip, etc.