Well, once you get to the starcruiser, you'll have your choice of over 100 bathrooms!!
The only way I see SWGS benefitting DHS is if they move whoever is left in the offices of Animation building (but does not really need to be within 5 minute walking distance of guest areas) out there into the staterooms. If that happens they might expand the park and open up the two dead ends before the heat death of the universe. Maybe.Yeah, I don't think the distance itself is a problem.
The real issue is that there's nothing between them. You'd be looking at parking and backstage and an unthemed warehouse building (the former Starcruiser) with no bathrooms, snacks, etc. on the way. They'd have to spend a lot of additional money on filling that in with theming etc.
It's basically the same problem with having a walking path to Rafiki's at DAK, although that one is longer and has less of a theme problem since it's mostly woods. Still lacking in bathrooms etc. though.