Wow, this is a good question but I feel like for me/my family here's what would make our Disney resort stays even more enjoyable-
1. Free parking for resort guests (won't happen, just throwing that out there)
2. Renovations- make it a corporate policy that only one resort per category (val/mod/del) can be under major construction at a time. And when a resort is under construction, the room rates should reflect this (not just give them a trading pin and call it even or a gift card). Guests are paying a premium even at these resorts with significant construction going on and it's not right to charge rack rate knowing that you will see the mess, hear the mess and not get the full amenities associated with your resort.
3. Keep the unique disney feel theming in the rooms (mostly noticeable at the recently reno'ed rooms). They are stark white and devoid of all theming- they look like a room at the hilton. Blah. Bring back the unique furniture pieces specially made for Disney, the cool shower curtains, the little touches that make the rooms feel magical.
4. Add a new exciting benefit to guests choosing to stay onsite- Not sure exactly what that is, but I feel like since we're getting nailed with parking fees, they need to throw something at us that doesn't really "cost" Disney much money but is a benefit. Maybe one more FP+ or a window freebie FP+ w/ limitations for a ride tier but something that's more flexible. Haven't fully thought that through yet but a lot of the other benefits we already get we should get because as resort guests we are already paying a premium for. Maybe a discount on a Minnie Van, a small discount on resort items in the shops, 5% something to reward you for staying.
5. Check in goodies/events going on-When we stayed at Poly years -years ago, I recall leis being given out, and CM welcoming you from the car and bringing you to check in. It was similar to the fuss they make when you board a
Disney Cruise. I know there isn't enough staff to go around as it is, but it's such a neat thing as a little kid to see that (or as an adult) since you wouldn't get that anywhere else. It's not super costly but just need the staff to make it happen.
Staying on property is magical for us and special but there are so many more ways Disney could enhance the experience.