I do think your resort neighbors can make a difference on how quiet your room will be. I would personally ask for a room change, if it got too bad. This really has nothing to do with the cost of the room. You are not going to change the habits of your resort neighbors. You may get stuck again with noisy neighbors if you move, but it's worth a try. Some hints for more quiet would be to stay away from elevator areas, staircases, corner rooms with traffic patterns, pool areas, ice machine and vending machines, laundry areas, etc. when getting your room. Earplugs may make a difference, too.
Many resort toilets are power toilets and they will be loud no matter where you stay. Showers can be the same way. This is especially true of high rise resorts. Most resorts back-up the bathrooms to be next to each other to save on plumbing costs, etc.; so, it's the price you pay for using a resort room.
I'm a park person at Disney and we use our room to sleep mostly. By the time we end our day, we are pooped and we sleep well. By the way, I find the deluxes at Disney to have noisier neighbors. We've been to Disney around 20X and we've stayed almost everywhere at Disney. You won't like what I have to say here, but the adults at the deluxes have a tendency to stay out later (Pleasure Island, etc.) and perhaps drink a little too much and they can be very rowdy in the halls, etc. getting back to their rooms in the wee hours. Also, the children tend to have more tantrums, etc. I assume, it's because they get so much all the time at home, etc. I've seen children hitting their parents and screaming at the top of their lungs at the deluxes to get their way. I really don't believe spending more on a room is necessarily a guarantee of more quiet. We travel alot and we've seen it all including someone vomiting, etc.
If it's a real issue about the noise, I think I would go with a villa, cabin, etc. where there's more distance between everyone. You will pay for the privelege, but how you want to enjoy your vacation is an individual choice.
Personally, I like saving the bucks with a value for a number of reasons. We are not in our room too much. We go to better restaurants, see better places (like La Nouba), take tours, buy more souvenirs, etc. with the money saved at Disney. Also, I can take two trips to Disney for the cost of one fancy resort stay at Disney. You make personal choices on vacation. If I was a billionaire, I would have the best of the best all the time, but for most of us this will not happen. Each to their own!