That would have made his special skill useless. He'd never be able to use it at full health, so having something like regen on him would be bad. He'd essentially only be useful for a regular attack, which half the characters are already only good for anyways. Cyan and Sabin are two characters that have special moves which are stronger than their main attack for most of the game. They're legit useful attacks, that make them two of your strongest characters early on. I feel the Swd Tech was fine as it was. You have to wait for the other characters to use their moves and then recharge their ATB anyways, so I always had him go last and just charged it as they were attacking/charging. Until late in the game where he could cast quick and use it freely.
Towards the end of the game, every character becomes dull anyways. There becomes very little strategy left, especially if you power level, as everything does max damage.
THE JACKEL