I haven't even seen reporting that he blocked an impact trade. The report was that there was way too much going up and down the ladder through GM, President and ownership, and that Shanahan had blocked trades that could have helped us advance in the playoffs, which given the tiny margins we've lost by, could be almost anything.
And regardless, even if it was an impact trade, an impact trade doesn't mean trading away Knies. That's ridiculous, and a wild leap. We have prospects and draft capital other than Knies. We made multiple impact trades at the deadline and none involved him. Given everything we know and everything Dubas has said about Knies, his availability, and his potential impact for our team in the playoffs, there's no reason to think that Knies was involved.
This shouldn't need to be said, but people shouldn't be making up wild scenarios they have no evidence of, and blaming Dubas for it.