If everything was essentially OK and still seems OK, I would probably not mess with it. I think you could go a long way though in sleeping nights by getting a written plan. For example, a log by all fishermen would be a great help and an absolute starting place. It might be the basis for making slot limit decisions. Or you might want to keep all bass under 13 inches or have crappie tournaments. You need to find out something about your bluegill base. These could all be maintenance issues but the log is the starting place. After a couple of years, have the log reviewed by a pro. That is probably a lot cheaper than a shocking survey. There also might be some pro's that you could make honorary club members.