Those are great trucks! What year is yours?I drive a 2 door Tahoe. If this came out I would be all over it!
In SOME off-road situations, like rock crawling, yes. In others, a longer wheel base is more stable and will provide a better ride and handling at high speeds (think desert).Without a doubt, a two door version would be substantially better off road.
Tank turns could be handy but I don't know if I'd trust it in certain situations.Better breakover angles are great and all, but if your undercarriage is basically a bulletproof skid plate, I'm not sure you really need to care as much as you do in a traditional offroad vehicle. I personally wouldn't trade the additional cabin space and non-offroad utility for that one benefit. I don't know what other benefit the shorter wheelbase really gets you - maybe a bit more maneuverability, but with tank turns do I really care?