Florida is the tough one, they had a great year last season but is it actually sustainable? They have some great top end talent (Barkov, Huberdeau) but so many other players played above expectations, it's hard to imagine them having everything go that right again.
Weegar doubled his previous career high in points
Verhaeghe the late bloomer doubled his high in goals and almost tripled his high in pts
Wenneberg had more goals last season in 56 games than the previous 3 seasons combined (198games) - I know he's gone but still unexpected production
Bennet had more points in 10 games with Florida then the previous 38 games in Calgary or the previous season
Throw in guys like Duclair, and Vatrano who are niche type of players who both had good years for them.
Their Goalie situation is also interesting, Driedger had far better stats and 14 of the teams wins, but Bobrovsky still had a good record despite mediocre stats, and in 2019/2020 Bobrovsky was terrible so who knows what they are going to get from him. They also have Knight who looks very good but unproven so who knows there.