Most likely they won't, but even a tip-toe in that direction would be welcome. On the flip side, MSNBC could stand to take a similar approach and inch their way a bit more towards the center as well.
Regardless of which way FOX goes as a whole, it's important for key players there like Shep and others to stand their ground. As scary as it is, Trump does seem to actually listen to the opinions propagated on FOXNews, so if they can talk him out of even just a few of his crazier proposals or get him to reverse course on some policy pursuits, just by being critical of him on the air as some on the network have been already, then that would be a good thing.