I still don't agree with you Squeak,
The Tyros is not a guitar -- its a keyboard. A sax and trumpet player would also find problems with the way the SA effects work on those instruments. How on earth could you expect the keyboard to know if you are playing fretted or open chords?
My experience with guitarists is that they are absolutely blown away with the Tyros guitars. There's probably a simple reason for that: They don't expect them to be perfect -- guitar technique has almost nothing in common with a piano technique -- so how could it be?
With all due respect I think you're complaints are unreasonable. The concept is great, and in my personal opinion nobody has done a better job.
As a guitarist though, I can understand your frustrations!
Chony