We can't access our bathroom with the slide in on our 29QBH either. We were really concerned at first, but then we figured you just open the slide a 1' and you are good to go. Takes about 10 seconds to open a foot and always have had at least a foot when we needed to open it.
The other issue with the slide is you are NOT suppoased to walk, step, sit, etc on it when it's not fully extended. The way that slide works, in order to be flush to the floor when open the slide floor ends up being elevated 1-2" when retracted and can't support weight that way. Therefore we have lost the ability to stop in route and have lunch together in the TT unless you are somewhere where we can deploy the slide. We have gotten used to that, but we do miss our 26BH for in route convenience but not for in CG comfort.