Maby that's better than just balduro holding on to the premine.
Fact is, Balduro is NOT going to hold on the pre-mine! This is a fact because there are only two options:
1. Balduro destroys the pre-mine as promised
2. Balduro doen not destroy the pre-mine and we do it for him in a hard fork
Sometimes life can be simple

Balduro delivered all what he promissed. Do we need a "coup d'etat" after the airdrop? Does this make a good story for the coin?
I might be wrong but I suspect the reason why the premined coins are not burned is the lack of Auroracoin Foundation or the initialy proposed Icelandic Criptocurrency Society.
The foundation was a part of the plan right from the begining (one year ago) and I hope will be established soon.
Ask yourself why the coins are not burned yet?