I would assume the following ideas are null and void.
1. Option to revert to previous armor for those people that put the flamekissed over their T3 Armor thinking it was a mod.
2. Option for those that bought the existing armor to keep it if they wish.
Recommendation: If you don’t wish to see a huge flood of requests to refund gems which would leave lots of room for human error and customer satisfaction issues. You should replace the armor with something similar. The specifics being – Attractive slimming armor, minimalistic (not some full body suit that hides the character), and something that makes the flame effect be a as attractive as the current light armor (subtle effect that augments the armor)
Just my two cents – Flame Away