It once took me 30 minutes to get through security at MCO, through the TSA pre line.
Fewer flights at 7a may also mean fewer TSA employees working.
No checked luggage. You might be OK if you have a car service booked.
edited to add Your airline makes a difference. A low BP, or even eligibility for pre-board, won't mean much with Southwest if you get to the gate after boarding starts.
A poster on a different internet board once posted " A flier who never missed a flight is a flier who wasted hours in airports through the years". That attitude might make sense for a business flier, flying on a route with hourly service, but not so much for families flying home from vacation.