Regarding 'slow speaking' strings, some of the sample libraries can be controlled
with the mod wheel. Right down = slow attack, then moving up for a quicker or instant attack.
This can be controlled and recorded after the note entry, or of course painted in
the cc# lanes or PRV.
As Dad said, nudging over as well,
(but you are still left with the problem of slow attack, if not wanted).
In fact if you have block chords,
or even just double stops (which ever section), never have them both hit at the same time,
nudge one (or more if chords) over. Apart from sounding more realistic, it can stop any phasing
issues (especially on unison lines) when bounced to Audio.