I rewatched the game for whatever reason:
1) The spot was really bad. The linesman on that side got demolished, but it should have been a better spot regardless. BTW, it's not a reviewable play, but also, technically, any obvious error with significant game impact can be reviewed. Basically, it's a judgement call whether to review or not, but we aren't entitled to challenge it. Taking 5 minutes to decide something is not worth the time to review is so on brand.
2) I'm okay with the non-PI call on Sanders up the seam. The defender doesn't have to move out of position to provide a clean path to the ball. It doesn't look like there's any grabbing or excess pushing. The only thing that bugs me is that we definitely have been and would be called for this.
3) Speaking of which, the DPI call on Brooks(?) bad. For all the reasons stated above, but there's also barely any contact. I think this got called because the WR knew he was beat and gave up on the play. I don't think it was uncatchable, fwiw. It probably was actually uncatchable, but it was close enough that you don't rule it that way.
4) The Ewers TD thing was definitely the spike, He didn't really spike it, but he dropped it aggressively enough that it took a big bounce. It's not uncommon to have refs warn you for things like that.