At least we made it past the first round
A lot of people thought the Panthers were the favorites after the trade deadline, so knocking Zito for going for it is a bit of revisionist thinking.
They may overpay in UFA next summer, but they have 7.7M to spend on the blueline. They can get a #4 guy and a solid bottom pair guy with that. Forsling is also a top 3 D. And if you don't think so then you don't know what you're talking about. He has terrific analytics since joining the Panthers. He was the Panthers' best D last playoffs. Arguably in 2021 as well.
Who is available next summer? Orlov, Gavrikov, Graves, Mayfield, Dumba...a bunch of quality guys. I'm not saying they are going to change the face of the Panthers' blueline, but they will definitely help it. With a further solidifying of the blueline, continued progress by Knight, and a healthy forward corps, the Panthers should definitely be a playoff team next season.
I'd worry about your own Leafs, as well. This year is their best shot. You talk about a path forward? Tavares will be entering his mid-30's in a couple years, and Muzzin and Giordano will also age out of effectiveness very soon. Toronto will still be a good team, but I don't see a team there that can beat Tampa, Avs etc. in the playoffs. They are in no better position than the Panthers over the next several years. The team who will have the edge is the one who makes the right tweaks or gets lucky with a prospect making an impact.