Not all the deluxes have better transportation to theme parks -- the very best deluxe (AKL) doesn't have any special transportation at all. It's really just the ones on the monorail loop and then the fact that you can walk to EPCOT/DHS from the three Boardwalk area resorts. I don't find the boats at some resorts any better than using the buses (and some moderates have boat transportation as well, albeit to Disney Springs).
POR is easily worth the extra price over any of the values for me -- it's peaceful/quiet and has beautiful grounds. I think it's the best resort at Disney in terms of overall value for the price. It depends on what you care about at a hotel (Disney hotel specifically), though. I'm sure the All-Star resorts are the best value for some people but I wouldn't pay $50 to stay there; it's all relative.
Again, none of the hotels are worth what they're charging in a vacuum. When I'm talking about value, I only mean relative to other Disney hotels.