I can't speak to the quality of the DS Hotels. The last time I stayed there, it was the Hotel Plaza and the Bicentennial hadn't taken place yet.
But I can speak to POP. It is easily the best of the values and has some of the best bus service out there (plus you can always catch an AoA bus and walk through AoA and across the bridge back to POP). Note that when I say values, I don't mean AoA, or the family suites at All-Star Music. A very important factor is what's up with your group, how many are in your party, what's the purpose of the trip, and does anyone have claustrophobia, or really need elbow room? How much do you plan on using a table in your room? All these points matter.
Face the facts: POP's room's are smaller than anything at Disney Springs. However, if you're going as a solo or a couple, then you can put up the Murphy bed at POP and have effectively more room than at many of Disney's moderates. Plus you get a makeup mirror, and a coffee maker now at POP, plus a double shower feature, which isn't there at most Disney Deluxe hotels. The room redesign and refurbishment really went out there on upgrading a small space and in making that small space bigger and more liveable. But, if you're going in a group of 4 adult-sized persons, then POP can get cramped, so group size matters.
My advice? Go on YouTube and search for room tours of the resorts you're interested in. There are new ones posted all the time, so it shouldn't be hard to find ones with current rooms on them, with the most common variation being people unaware that they're in an accessible room, which usually have a some differences between regular rooms.