I think it would be cool to be able to catch bluegill with float and live bait. It's the most common way in real life and it would be fun to find a place with lots of bluegill and enjoy a little float-fishing from your boat. Using float and live bait on lakes with bluegill I only managed to catch yellow perch and crappie. And you have to wait a really long time for them to take the bait. I would find spots with bluegill, could see them swimming beneath my boat, but they wouldn't take any live bait. But if you throw them lure bigger then themselves, they would bite normally. Breaks the immersion a bit for me. Love the game nonetheless.
You can catch bluegill too but float fishing on the bass lakes is incredibly tedious since the bite rates are so low.