Both his aerial and grounded version need super armor. Just on the startup really. The theory I have is that if you have really good reaction time, you will abuse SA on the startup to "dodge" predictable attacks and punish. A buff like this would also help Ganondorf alleviate his problem of getting comboed a lot to some extent.
SA any longer than that doesn't matter for the most part, since the appropriate reaction to observed Flame Chokes is spotdodging.
No, it's not stupidly easy to abuse this. You would STILL have to bait attacks, because you still lose if your opponent spotdodges. Just, a buff like this specifically could be viably used to counter pokes. It would be like Marth's counter in a sense. It's a GREAT move under a skilled player, but you can't just rely on it.
And of course, there is the problem of getting grabbed out of Flame Choke, which sucks a lot.
The more obvious solution to Ganon's problems is getting a poke of course, which is obviously what our developers are trying to avoid. However, I still will complain that it's pretty ridiculous that Ganon's Jab is the only one that is always unsafe on spotdodge. Come on, tell me the logic behind having a Jab that has TWENTY FIVE ****ING FRAMES OF ENDING LAG. 25 frames is the duration of the average spotdodge keep in mind, which means you are always at a frame disadvantage when your opponent spotdodges your Jab. I would personally suggest knocking off at least 5 frames of ending lag from that which would give Ganondorf a chance to roll away depending on the timing of when his Jab would have gotten spotdodged.