As far as airports go, LAS ain't too bad!
TSA has hustle, here. It's not too big, but you can still roam a bit if you get there too early. There are slot machines absolutely everywhere. You know you're in Vegas, I guess.
Tip: The Uber/Lyft area can be tricky. It's signed well, but the process isn't clear when you get there. It's in the second floor of the parking garage. There's four or five rows of parking spots for the rideshare drivers. It's hard to keep an eye out for your driver if they happen to pull into one of the further back rows, so you'll probably be relying on your driver to make a pick-up call.