Look it's been widely reported that Henne is not allowed by the coaches to change the play once it's called...the end zone play was called to be thrown to Hartline and that's where Henne went with the ball. If you wanted the ball to be thrown to Marshall then blame the coaches for it.
The ball thrown to Hartline was a bit underthrown but we are talking about say two feet. I don't blame Henne for that at all. Many factors could have effected the throw once it left Henne's hand and more to the point, it was a completion.
The ball thrown to Marshall that was picked was simly a bad throw...Henne gets the blame for this one.
And as far as mobility goes I remarked about the very play you are referring to and yes he wa slow...but later on her scrambled and elluded tacklers very nicely...so I think he's good enough here and he has been running more lately so he's making progress...all you can ask from him here.
Henne was; 19(att)-28(comp)-240(yds)-8.6(avg)-54(lng)-1
-1(int)-91.4(rtg)
Not a bad game and he tied his second best QB rating of the season. His short coming yesterday was that his completion percentage could have been a bit better and he threw one pick...those are fixable errors.