If Henson is doing poorly and these guys have a pulse then why would they want to trade a future starter for someone who has done nothing but mostly play baseball for several years, didn't do much in college, is currently hurt and not doing well.
I suppose if you mean cut Henson and bring in a backup you have to look at that thru Parcells eyes. He has an unknown doing reasonably well in Romo. So there is your backup or number three. If I were Parcells I would want to bring someone in here who has actually started or at least played as a backup well enough to play a few games for me.
That narrows it down somewhat and kicks the price up significantly. Otherwise best hang onto Henson and hope your gamble works out. And why would you cut a third round pick with a reasonable amount of money tied up when he's hurt. The man has a hurt throwing hand and seems to at least marginally be getting better. That says his hand may be getting better and maybe you should finish your evaluation. You can't cut a QB who is not throwing well when his throwing hand is hurt. Good Grief.