I know that last year Joe Gibbs threw out a challenge flag when the opposing team had twelve men on the field and the other team was penalized. So, penalties can be reviewed. I don't know if delay of game (or lack of) calls can be reviewed, though.
Yeah, but over the weekend Waters said he wanted out of KC. The line wasn't as bad last year as the year before though. The D HAS to be adressed whether it's Curry at #3 or someone else if they trade down.