The offsides negated a KC interception of Brady. Dee Ford was over the line. It was an enormous penalty. KC would have kept the lead and iced the game with that INT. I thought it was the right call. Offsides, especially when someone LINES UP offsides, is one of the easier judgments.
In one of those articles I shared, it was mentioned that some argued that Dee Ford was unfairly drawn offsides (albeit still a foul) by Trent Brown (NE OT) who wasn't on the LOS (so: illegal formation). But even if that's true, the INT would still have been negated with offetting fouls and the only difference would have been the 5-yards NE got, which ... given how Brown-Gronkowski got them 25-y in one pass down to the 4-yl on the next play, may not have impacted the game.