For us it is not worth it (or hasn't been thus far).
The two deluxes that have a price point I am comfortable with are WL & AKL. Both of which have rooms roughly the same size as a moderate. So that has me balking as far as trying them out.
Right now, our preferance is a spread out mod, which excludes POFQ. We like having a sit down restaurant, food court, and lots of space/grounds and pools. The boat to Dtd at POR and the beaches at cbr and csr really make us feel like we are at a resort, but for hundreds/thousands less than a deluxe.
We spend a lot of time at our resort, to us the mods are a great place to relax.
Since room service, interior hallways, and being attached to a park ( although the Wilderness Lodge and Animal Kingdom Lodge are not attached to a park), as well as transportation that isn't a bus; are not important to us, so a moderate fits our criteria.
The deluxe in a sense was a waste to us and the lack of cs was a negative. However we enjoyed our stays and didn't regret them.
We love CSR, ( just had 10 great night's there) and it has the most amenities of any mod. POR also has a lot to offer.
Saving money is a winner, and you know you love AKL, so you can't go wrong!