I disagree with this. The evening lounge spread is very good for the United States and definitely the best of all the Marriott properties near Disneyland. The elite breakfast is good quality despite having few hot options. You can actually use Suite Night Awards here to get 1-bedroom suites which you're not going to get at any of the other Marriott properties near Disneyland.
Compared to other hotels near Disneyland, soundproofing is also not something I would worry about for the Westin.
It's certainly disappointing that they don't let elites use their welcome benefit for restaurant breakfast and don't have an elite check-in line but I'd actually say they have the best elite benefits for any Marriott property near Disneyland. If you're comparing to hotels outside of the United States, then sure, the Westin elite benefits are not good but elite benefits in the US are generally really bad.