Thansk for all the replies. Sounds like these could work if the stalls were big enough, if the tack rooms were positioned towards the front, if horses had their own tack and supplies, well, lots of "ifs" but it sounds like they can work if designed properly.
I don't think it needs to be all or nothing. I can see still having crossties outside of the stalls for those who prefer, and a central location for shared supplies and extras. But I like having personal space and not having things get borrowed.
I groom and tack up my horse in his stall with no crossties. He is a calm warmblood. But I used to lease a TBx and there is no WAY I would spend more time than necessary in a stall with that guy. It was enter stall, halter on, lead him out and later lead him in, halter off, and I was out of there!