Do you even make your sims swim? All they can do is swim laps and splash people. There's the jumping platform but that's just a way to get into the pool. I like building pools but they're so borin...
I wonder if pools and swimming actions might be overhauled altogether if a pack comes out with a seaside holiday world. Possibly that might come out in the future. Water tools were not included in the latest patch so maybe that is to come? It looks like terrain tools have been taken over by someone with great enthusiasm and ability judging from the Livestream.