how about having a fishing skill line. Maybe get valuables other than Perfect roe when you cut fish. have skills when you unlock increase your chances of perfect roe. Also maybe have a slight increase in perfect roe chances or double fish caught for those with master angler achievement. I'm sure you guys can come up with something to make fishing outside summerset desirable. maybe even a new motif like you did in Summerset. one would level up the skill by fishing.