I thought having a spider mutation/trinket that allows moving faster on zip lines/reverse on zip lines would be a good addition and it'd make sense thematically since they are made of webs. Maybe a mini-boss to unlock it or get all the spiders gold in the peeper to unlock it.
I think you should have a store on the quest computer to spend raw science on bug parts. Late game, I have a ton of raw science with nothing to use it on. It'd give an outlet for it and a reason to continue doing tasks. It'd also be nice to have a craftable computer you could put in your base.