IMO, 7" blades have a limited use - My USMC and RD7 are strictly for field use w/ the military, and something that I would take w/ me to combat. The Mojo would be in the same boat (and the USMC would be out!)
Maybe it is because I have used 6 and 7 inch blades for so long, but I like them. The first time I ever saw a knife chop down a tree it was a US Navy Ka-Bar in the hands of 12 year old kid. It was a fairly large pine tree, too. A 7" blade can chop, and it is more compact and easier to handle than a 9" or 10" knife.
