Yes, I agree, it does seem to be unusable with the slide in.
As a potentially solo traveler, I am considering this sort of layout as a possible option, but with sleeping space above the cab for the quick Cracker Barrel type overnights with the slide in. I initially ruled this floor plan out, but there are workarounds. Since many people hate it, there may be better pricing for this layout, e.g. small (22' to 24') Class C, 2015 or newer for less than $40k.