I don't see this as positive news at all.
Hmm. I thought everyone reckoned Segwit was a fine idea. It does clear up a bunch of things that stand outside the scaling bollocks.
Yeah, if such a diversion of hashing power actually happens, then I suppose that we will see how it plays out. I doubt that in the end, there is going to be 12% support or larger that wants to block SegWit and the various possible negative ramifications that would be caused by such a blocking of SegWit.
I would imagine that if ViaBTC plays such a card, then either ViaBTC would be losing some of their hashing power, or other miners are going to pool resources in such a way to support other non-ViaBTC mining in order to undermine ViaBTC mining power.
Sure, there would be some uncertainties regarding how some of this will play out.. but in the end, it seems that SegWit is fairly non-controversial, even though some goofballs want to use it as a kind of leverage for their own narrow-minded and ill thought out agenda.