From my recollection, the group threatening the "nuclear option" is not promoting core, but promoting a pure, uncluttered version of bitcoin they have been working on (available here -> http://thebitcoin.foundation )

If bitcoin hard forks, and if your preferred fork were not in the majority, a change PoW algorithm would be rational and recommended. In fact, depending on the split of hashpower, refusing to change the proof of work algorithm would be suicidal.

I'm still undecided, I appreciate the value that a group like blockstream can offer in terms of innovation. I also appreciate the value of a group like The Serene Republic can offer in terms of protecting the vision of incorruptible money.

I have no dog in this fight, and I haven't been following very closely lately. My position is set, my coins are old and will spend on whatever forks emerge so I'm not as immersed as I used to be. --but... if you are bullish about the long term prospect of bitcoin, but uncertain of the resolution of this bitcoin civil war, your best option might be to simply secure as many bitcoin as you can before the hard fork happens to secure your place on all subsequent forks.