I looked at the three maps provided by your link. It didn't indicate Florida was at the "lower end" of anything. Especially when you consider the skew in jobs related to hospitality, that was positively crushed, and the number of elderly. Couple this with states that locked down and are doing much worse. Happy to discuss a particular stat if you'd like, rather than general macro economical subjectiveness.
I think “booming” is a rather general macroeconomic descriptor. I don’t knock Florida in general - other than the water tends to smell awful - I’m just saying doing a sort of cost benefit analysis the economic upside of lesser restrictions doesn’t seemingly translate to much of an obvious economic gain.
Id hypothesize lower infection rates and higher the vaccination rates would translate to greater economic gains.