This all boils down to what works for me doesn't need to work for other every other person......
I'm not saying I want Tom Sheppard's G-wagon ( well I do, but not in this capacity ).
I basically fall off the page when it comes to the crossover between 'overlanding' and 'rockcrawling'. I tend to take on more challenging terrain than most would in the typical overland vehicles. My daily driver dodge truck is basically on a 39" tire with no lift.....it works FANTASTIC overall, its just too dang big overall, tire size doesn't have anything to do with it....its just the body dimensions.
If you like having the rear door option that is great for you, but I think you have to realize that it just isn't an attractive option for me. Arguing over the weight of a large tire vs the weight of a rear door with full interior trim and roll up windows isn't going to work. I would MUCH rather have the larger tire than the window
Maybe you just need to organize you gear differently so you don't have to crawl in the back so far?
Lets try and get this thread back on track to the concept.......instead of just trying to change the concept. If you don't like the concept, well....