It seems I have read recently that the SC is starting to push back against that, especially Gorsuch. I guess only time will tell if the courts decide to let this stand or not. Hell, it is still in the discussion phase right now. Maybe they will see the light and change their minds again before the change actually gets implemented.
Ah, right. Two things, kinda in reverse order.
1) This "comment" phase isn't really about discussion. Doesn't really matter how many comments "against" they get, the agency has the power to change the interpretation and promulgate the new rule.
2) Indeed, this agency deference issue has been percolating for awhile.
A pretty readable article from SCOTUSblog:
The roots and limits of Gorsuch?s views on Chevron deference - SCOTUSblog