FOR NOW (since Justy likes this phrase)
Leave it at 13 weeks. A complete test of a hard fork can be built and tested, once Consensus Witnesses are in place.

I feel like the Exchanges are hold Steem Community, AND their own customers' assets hostage. What prohibits them from Powering down NOW? Why not start? ONCE a complete build happens, and it TESTED, Exchanges can always stop a power down, and restart. But no... why not POWER DOWN, now, and stop holding a sword over clients and Steem Community members, with an unspoken threat?