Hmm on one level I do not want to make this too easy since flaws help define your relationship to the world and in the system they are supposed to be permanent. On the other hand you are an Exalt with the power to make flaws and derangement go poof, just not your own. The theme of overcoming the impossible does kind of get dented if you cannot warm up. It was a 2 point flaw so I'll say 5 XP should be enough to toggle it to the level where you are cold, but not a block of ice and 10 XP to train yourself out of it
You can also win at the horse races guaranteed once with the crown. Again as far as your power is concerned one race is the same as the other because they are really mundane. I mean you are not even wagering for souls on the prowess of fire breathing Wyld-beasts