In an ideal world Square Enix will remove the titles from those who cheesed the duels by entering after getting buffs on a dummy. That is an exploit because you couldn't otherwise get buffs on you if you entered the encounter normally. But I have a feeling that Square Enix cannot differentiate those who cheesed the duels and those who did not.

Finishing the fight in one and a half minute or less, thereby skipping most of the mechanics does not show skill. Even if you entered the duel with Ordained caster without pre-applying buffs like Chainspell that could otherwise not be applied without the exploit, you would still have to deal with quite a few of the mechanics. This is at the level of Ungarmax exploits and it's sad that Square Enix is not doing anything about it, therefore completely diluting the prestige of the title. Even the Sword of the South title is retroactively diluted because you can do the same in the old duels. They banned people who used Ungarmax in UCOB. I don't want to see bans being handed out but at the very least the exploit should be fixed. Removing the titles from those who used the exploit would be better but I doubt SE would do so. So please at least fix the exploit.