Yes, I’m 6ft and have to hunch over in the back of the LLV, or squat down while re-sorting packages. The inner compartment door is one of the best things about the LLV since the heaters suck and it helps keep the heat in the cabin, plus the ease of access.
I haven’t gotten to use one of these new trucks because I’m in a smaller office which will likely be one of the last to get them but they did try and get us the newer Metris vans which are horrible. No inner compartment door so you have to constantly get out and no adjustability to the mail tray.