I will add - The One town I can think of I Know I got rid of just for the designing - Was based more on not being able to open his town, it wouldn't load after a point.
I will elaborate on why - because it wasn't average "messy" neighbor stuff.
He was a completionist - which in itself, can make your town hard to load for your neighbors with older devices.... but even after my device upgrade, his was the one that didn't open - it was because not only did he have everything as it came out - some things he had multiples - and I'm not talking 3 police cruisers - I'm talking, police cruisers surrounding all of town on the edge, the tether ball/brick- 3 rows deep all the way around the school, nuclear warhead- 6 rows across by 15 deep behind Herman's - I could go on, but I bet you get the point. Not only was it messy, no design - it was so crowded, it wouldn't load.