if people still run core as a minority, won't there be a massive downward difficulty adjustment after however many 'long' blocks,
meaning people would be able to get back into mining as that happens ?
and a price crash as people sell leading to cheap coin ?
Long blocks are not that bad if you recall that millions people receive bank transfers with 2-3 day delays without any problems.
Price of the both versions will crash anyway because of panic. People quitting Bitcoin for XT won't affect the price too much.