It's going to come down to how much you're comfortable spending and what kind of utility you get out of the perks, especially since it's easily 3x the price of a Harbor-side hotel.
The top 2 perks for me are as follows:
1) Semi-private security check/entrance into DtD + DCA
--> Great when it's hot or raining (it's shaded and the line tends to be a lot shorter than the Harbor security entrance)
2) Shortest distance from parks to hotel room
--> Great for families with small children (less of a sunk time cost when going back to the hotel for a nap)
--> Great for other adults with mobility issues
One major downside is, depending on how sensitive you are to sound and where your room is placed, sleeping early may be difficult. The VGC wing/south facing rooms face the garden plaza of DCA and we have had some issues before attempting to nap/sleep early when a band is performing. The rooms are pretty well insulated, but if you hear everything... well, game over.
All of the other intangibles -- decor, service, etc.. can be relatively duplicated at other 4* hotels nearby (DLH, JW Marriott*, Hilton, Marriott).
When it's an adult Disney trip, we stay harbor-side or even way off park and take an Uber/Lyft in. When it's a family trip that is short (weekend Fri-Sun), we stay at GCH or DLH to cut back on transit time and maximize time in the park. When it's a long family trip, we stay at a Harbor-side hotel (usually Tropicana Inn and Suites) because transit time has less of an impact.
Our stays at GCH are a mix of cash + hotels.com credits, as well as a VGC contract that helps reduce the financial "bite" that the hotel tends to give. You can always split-stay, but I find it disruptive to switch hotels midway through a trip.
*JWM isn't open yet, AFAIK... I can't comment on the pricing or if they have private shuttle service, but an ART shuttle is nearby. Uber/Lyft would still be an option.