Dominion_Sage
I'd consider upgrading things to a futuristic level in terms with items etc, that's one idea. As for a business style system, author i suggest you try read "God of investment", the author stopped publishing but the system idea was new and interesting.
Love the novel and glad to see your back. Potential ideas is having quests made to determine trustworthiness with rewards being unique items/techniques so the MC can build a group of trustworthy but powerful people. Potentially working towards an upgrade to this system sharing to enable trades of items 'with the system' which MC would receive in return for something MC can make this would lead to the ability for the MC to farm items or materials and even cultivation techniques since he could receive them in this method. Those are my initial ideas I could think of since you have an amazing base idea with the system and am quite looking forward to what will be done in the future.
Hey author man My advice is this Use that big ol brain of yours and keep writing because this story is awesome. if your running out of ideas then find a good story and get inspiration on from it, but if your looking for my opinion make the mc be kinda like a game system Where he gives them quests and stuff like you where doing there.