Care to defend your position? You won't do it as good as I will, but can you elaborate?
Tampa is a small market team who needs to sign one of the best centers in the game. They went to the finals, they're built to win now. If they know they won't sign Stamkos and ship him at the TDL, their cup aspirations just took a huge hit. If they know they won't sign Stamkos and decide to go for it, they lose him for nothing on July 1st.
Damned if you do, damned if you don't.
Just this year, they need to sign Stamkos [UFA], Kucherov (he got 65 points last year and this year is pacing for 69 - how much you think an arbitrator gives him, I bet it's 6) and Namestnikov are (I imagine) their top RFA priorities. They also have Killorn, Paquette, Nesterov and Brown as RFA. Braydon Coburn is a UFA (but I imagine he can't be retained).
...but the year after that is when it gets REALLY ugly...Palat, Johnson and Vasilevski on RFA, Bishop and freakin' VICTOR HEDMAN UFA.
They're close to the cap as it is - and there's not a lot of money coming off those books in the next few years. They need to shed money, they're in win-now and have too many crucial pieces up in the air upcoming. If the season ends today, their first is 23rd overall. A TB third rounder next year is pick 75-90. I'm sure it hurts to give up DeAngelo (who's likely outcome is a top-4 defender...which Gardiner is (more or less) right now)...well it sure as hell hurts to take Carle. Gardiner is 5 years younger, can step into their top 4 right now and saves them 1.5 over the same duration. Of all the pieces - TODAY (that time when Tampa needs to win), Gardiner is still the best NHLer.