WE have stayed in ASMo and ASMu and had a great stay each time.
ASMu was just recent, and only for three nights. But we walked each AS resort this time. However, we didn't go into the pool area at ASSp.
The ONLY complaint I have had with AS is the laundry facilities are too small. Otherwise the AS' are great. It's just DH and I and we are in the room very little. So large rooms and fancy pools really don't mean much to us.
It would be nicer of the rooms had coffee makers and the pool areas had hot tubs. But oh well. For the price, I won't complain. I like the close access to everything more so than a further walk to everything. Although if Disney gave me a CSR room for the same rate as an AS, I wouldn't complain.

And I can see that the in-room coffee maker is more important at a mod resort, such as CSR. Most likely guests have a further walk in CSR than an AS for morning coffee. (But not necessarily.)
Our room locations have been great. Woody building at ASMo. Calypso at ASMu.
Also, at ASMu we were facing the main pool.My first thought was the noise level. But the building is so well insulated on the front. It was a very quiet room from that aspect. Once you opened the door, there was a lot of pool noise, including loud music. But we didn't hear it in the room.
The AC was even nice and quiet.
The most noise came from hearing regular morning motel room noise -- just tiolets flushing and showers running. Nothing terrible, or unusual. Just what you would expect at any busy hotel. And it was busy that weekend (Columbus Day).