The rear view doesn’t bother me that much, most of the time when I am touring I have the back full anyway so I can’t see out the back even with a good window. There is a rear view camera for reversing so that’s fine. My preferred door arrangement is actually the one up and one down, it’s a little worse for trying to get stuff at the back of the loadspace but if you want to reach in to grab something quickly you can just open the top bit which is better access than the Grenadier little door, and stuff doesn’t fall out, and when you are stopped the tailgate makes a nice table or seat and the the top door gives you a bit of shelter if you are sitting on the tailgate or with thr taligate closed it gives you shelter while you are reaching into the back. The downside is that if you want the tyre on the back you need a swingaway carrier which adds weight and is an extra step for opening the back, but on my Discovery I never found it a huge hassle.