Per this source, they're 3rd in the league in most shorthanded times per game (262, 14 more than Boston and 33[!] more times than TB) and 5th worst in PK rate (74.05%)
2022-2023
Now, I'm no world class hockey mind, but it seems to me that this presents itself as a rather easy point of improvement.
Side note: Brandon Montour is in my fantasy replay team's top 4. Going over how my team's gonna look next year and it blew my mind to see a peripheral, offensive-first D man that was SEVENTH(!) overall with 99 PIM, just behind stalwarts like Arber Xhekaj and Austin Watson. Florida in fact has three players in the top eleven in PIM (Tkachuk and Lomberg the other two).
But OH NO, not a weakness on this team at all.
Yikes.