I've been having issues lately, with game stability. game would have intermittent framerate drops, longer than normal load screens, crashes usually followed the slowdowns.
I decided to watch my performance stats in task manager while playing. I noticed that during battles, in towns or tournaments, my cpu/gpu usage was fairly consistent; no problems. when I was in campaign map, my cpu/gpu usage would spike while the game was paused. the highest of these spikes would be when returning to the campaign map after a battle. 100% usage was fairly common. when traveling at normal or fast speed, my cpu/gpu usage would actually go down and remain steady, until i paused again.
Not sure if it's related to what's happening with Ramus, but hope it helps.