At this point, no one is going to use this exploit against KDC... at a network hash-rate of less than 100Mh/s... a straight up 51% attack would be easier and a guaranteed success compared the aggro of a using the KGW exploit. The exploit is most attractive for attacking networks where a 51% attack is not possible, because the KGW exploit only needs about 10% of the network hash-rate to be effective, so it makes the big networks vulnerable.
In the case of KDC, a 51% attack is instant and effective... and not much hash-rate would be needed... in fact... I could launch a 51% by myself at the moment with ease.
So more important to take the time to ensure the fix is implemented properly, add a few checkpoints, and make sure the hard fork is deployed after a considerable publicity and notice to all exchanges, merchants, users, and miners than rushing it because of the fear of being exploited.
If there is going to be another hard fork perhaps we should rethink the block payout... Hash is king and you have to pay for it.
I would suggest a fixed reward for all future blocks (no halving). Remember the more blocks hashed the less dilutive a payout is.
why not 88?
http://en.wikipedia.org/wiki/88_(number)