If you've ever been to Vegas, you would know that sometimes you hit the jackpot when the odds say you shouldn't.
Vegas had a lot of things fall just right from the beginning. They literally "got lucky". I mentioned several of them already.
Expecting a 2nd expansion team to be able to repeat what Vegas did is like expecting a team that just won the Cup to repeat that feat the next year. Even the best team needs a little "luck" on their side to win. No one expects things to fall the same way again.