Here, junior present you
Basically, it's recreational. They've multiple casinos, but I don't believe it's any different than the one I've visited in Macau. Themepark is awesome, strap on and do the kiddie rides that almost got me a heart attack.
If you've 2 days in Kuala Lumpur, may be can consider to spend half a day at Genting just to cool down a little. But if the sole purpose of site seeing, there is nothing to shout about.
Where I'm from we have 4 theme parks all close enough for a day trip visit. Sounds like we can skip Genting 👍