Hotfix A greatly improved the save times for me and hotfix B made the long saves less frequent. They went from 30-40 seconds to about 5-8 or sometimes instant when saving in settlements with any SS2-related objects. That's perfectly playable. My PC is a 10 years old potato, which is why I don't use any heavily scripted mods, major overhauls, custom bodies or high-poly weapons and armors. I took care to minimize potential conflicts with SS2.
So far I've had two seemingly random long saves that happened outside of claimed settlements. One in the diner booth at the Slog, it was my first visit to the settlement and my only interaction was trading with the lady farmer. The other long save occurred while entering Fort Hagen during the main quest. I opened that save in Fallrim tools and it had several active scripts from WSFW, no suspended stacks though. The active scripts belonged mostly to the resource and NPC manager, so I assume it had to do with daily updates. Both of these were autosaves and they were made during early afternoon hours.
So far I've had two seemingly random long saves that happened outside of claimed settlements. One in the diner booth at the Slog, it was my first visit to the settlement and my only interaction was trading with the lady farmer. The other long save occurred while entering Fort Hagen during the main quest. I opened that save in Fallrim tools and it had several active scripts from WSFW, no suspended stacks though. The active scripts belonged mostly to the resource and NPC manager, so I assume it had to do with daily updates. Both of these were autosaves and they were made during early afternoon hours.