another thing I think would be neat: make fishbucks more common, more important, and more interactive
let the fish use their fishbucks to buy perks in the house, or to punish their opponents. let them spend their bucks on fishtoys like bed removal, hand cuffs, or that "shut the fuck up" bag. or to buy perks like getting the penthouse or doordash. hell you could even tie it into elimination by letting them spend large quantities of fishbucks to purchase limited immunity, or have another fish's ballot thrown out.
charge them fishbucks for basic amenities like laundry, or hell even charge them rent to stay in the house to make sure they're competing. fine them for things like whispering. or shit, send them to the 'jail' and make them pay to get out.