The top 5 things I'm looking for.
QB time share. How much does each play? Is Hoyer being sat down a lot cause a trade is coming?
OL - Will Karras see snaps at center tonight or do they feel he is good to go? How much and where do Eluemenor and Cunningham line up? Does Froholdt end on a strong note?
Front 6 - Munson, Wise, Roberts, Parry. I want to see how much they play and how they do. I think/hope we don't see Winovich tonight. He's proven enough. Will Rivers and Calhoun make an appearance? How much and how deep does Cowart play? Is he already on the team or are they still figuring that that? Lots to watch here. Wise in particular is the most interesting guy on the front 6 to watch tonight. Particularly if he doesn't play at all as that is a sign a trade is on the way.
STs - Does it look good? Particular in punt/kick defense. With King out how will it look tonight. If it has issues we may see them trade for a STer. I wouldn't be surprised by that in any case but if issues come up it will be a giant red flag.
Burkhead - He has been in my dog house pretty much the entire preseason. I have not seen the burst or speed of his past self and I wonder if those injuries have taken their toll. If I don't see him show up at all tonight I would be very surprised if he makes this team.