I don't particularly like the casino, but Cosmopolitan has one of my favorite breakfast places in Vegas...Eggslut! I was just in Vegas last month for 4 days and I went there 3 times for the slut lol. And mmm that biscuit too.
Go to Lotus of Siam for sure (make reservations). The restaurants in the Cosmo are very good. I’ve always been a fan of the breakfast buffet at Paris. If you get sick of the strip hit up Hoover dam. It is pretty cool.