I really like the "Vision Land" off ramp idea. It would have all the positives you all mentioned, plus help spur development for this area (in which we discussed a few pages back).
The "yellow line" south of the TCH may not be that expensive if it can hug the creeks in the area without many crossings (minimum bridges). It's another story for the off and on-ramps, but that would be the case anywhere in between Elmwood and Mapleton exits. Then the it would connect to an extended LJR Parkway (in blue).
Btw, new land has been cleared to make way for an apartment complex (see red square) in the Hall's Creek development. With a few more residents in this area and a proposed new school within a couple of years, this area may finally get the development it deserves.