On a serious note, their form since Watford will be concerning for them.
They've not played any differently, but those fine margin games are just slowly creeping away from them. The mentality isn't what it was.
Now that they've actually won the league, with them not apparently looking to spend any significant money, and with Firmino seemingly declining, it'll be interesting to see if they can keep this mentality going into next season.
Hopefully they don't.
It's just regression to the mean.
We know from our *successful* centurions season, that you get on a roll, you feel unbeatable and snatch games at the end that you probably shouldn't win. After a while the aura builds up and you're 1-0 up before the whistle goes. Managers start resting people in your games because it's not worth it for them, top 6 coaches try insane new tactics they've never shown their team before. Before you know it you're 15 games into a winning streak and you've won the league in December.
But it's a bubble. All the underlying stats showed they were getting results way above their level of performance, and in the end it's just a numbers game. You slip up. The bubble pops.
They're still a good side but they were never up there with us 17-19, United 99, Arsenal 04 or Chelsea 05. And the lack of investment will bite them in the arse if they're stupid enough to do it again.