I flew SWA late August.
They cancelled my flight home and I had to scrabble to get another one and Disney guest services was great and contacted DME to ask if they could squeeze us on the bus coming right then since the new flight was earlier than the old flight.
My niece and her friend just flew SWA last week with no issues.
I'm headed back to Disney on SWA on November 18th. Really can't afford them screwing me over so hope it goes smoothly.
Seems like the couple of times lately that they cancelled a ton of flights they originated in Tampa.
My suggestion is to take the earliest flights you can so there's room to play with.