Funny, since my last post here two years ago, I have tried dozens of different picks, mostly in context of acoustic guitars. I eventually tried the very expensive and somewhat controversial BlueChip picks, and liked them alot on both acoustic and electric guitars.
However, it never occurred to me that they would be excellent for synth guitar tracking. But I have found that ghost notes and glitches are significantly reduced with my BlueChip picks.
It makes sense in the context of this thread, as the picks produce little noise and don't wear appreciably, so the edges are always dressed and generate minimal spurious noise to confuse the pitch-to-MIDI engines.
The picks are available here:http://www.bluechippick.net
I should note that any mention of BlueChip picks generates huge controversy on other guitar boards, mostly because some folks are offended at the audacity of a pick for costing so much. I make no claims about whether they are worth what they cost. I will say they are made from a VERY expensive material used for electronics and medical devices that has exceptional lubrication and wear characteristics (and simultaneously feels glassy smooth but is very grippy). I will also say that I have better VGuitar tracking results using my BlueChip pick than any other.
These are not a panacea. If you don't play cleanly already, these picks won't help. But if you play clean, these may help reduce the tracking errors caused by the pick itself. I have been very pleased with the results.
As an aside, I isolated a flaw in my technique on my GR55 by playing with my BlueChip. The glitches were so reduced, that when I heard one I was able to isolate the cause: turns out I sometimes slide the nail of my pick holding finger across the string. I'd noticed a little notch in my fingernail, but never realized when I was doing it. With the BlueChip, since it is so clean otherwise, the GR55 would glitch regularly when my nail slide over the string, but not otherwise. Now that I can hear it, I can correct it.