Reviews will depend on a person's expectations are for a hotel.
Disneyland area hotels are overpriced and below average for their brand. An exception may be the Howard Johnson which is nicer than the brand would suggest but even that property doesn't have the free breakfast that is standard with the brand. The same issue exists with the Fairfield so someone familiar with the brand would be surprised the lack of free breakfast but someone like my aunt who is not familiar with hotel brands really likes the hotel for its proximity to the parks.
One complaint I'm seeing about the Westin and JW is their treatment of elites. Both are stingy with upgrades and are disappointing food-wise for elites. If you're Marriott Platinum or above, a standard benefit is being able to choose the full breakfast buffet as an amenity but the Westin seems to force elites into a lackluster lounge breakfast. I'd much rather stay at the Sheraton Grande at Tokyo Disney than either of these two properties even without taking account of the fact that the Sheraton Grande is often only half the price of the Westin and JW.
If you're rating the JW and Westin with the perspective of a world traveler, they are lackluster and treat elites poorly. If you're comparing them to Disneyland area hotels, they're the highest quality you can get.