Yeah, actually I believe this 10% was the main threshold, and the 2-5% was a gradual ramping down to this threshold. I think it makes sense to have from an intuitive standpoint of not wanting to flood the STEEM pool in a moment of crisis, though I admit I don't really understand the full effects of the economic safeguard that was put in place.

Anyway, for now, it doesn't matter. This post is probably not going to be relevant for a while....