I am going to piggy back off of Pvegs sentiments.
I agree that Ertz looked very good and will most likely be our starter for Game 1. The most important thing that I noticed was that Ertz and sometimes Hubener had their timing down. Knowing the speed and the routes of the receiver is key to avoiding interceptions. Ertz consistently threw to his receivers as they broke and his passes hit them a split second after they turned. He stood out among the rest.
Heath is our deep threat guy. I can not imagine leaving him off the field as he may be the only receiver that can stretch the defense and keep them honest. Klein looked solid and will be a good possession receiver. Something that enamored me is that at one point the qb's separated and Hubener and Banks went with the starting offensive line and ran read option plays. It looked like our goal line offense. Interestingly enough, sometimes we would go two back sets and one would be split wide. Silmon and Barnes took turns split wide. Maybe this is a wrinkle that Dimel may put in place to create more mismatches towards the goal line.
Another interesting prospect is Kalin Heath. He may just redshirt this year, but the kid is big. He also was split wide in a few sets. He could be one to watch for next year.
Along with Pvegs, I agree that Jones is our #1 and Silmon looks to be #2. Silmon is very compact and I love his physicality. Barnes, Warmack, and Leverett were also in the mix.
TE's - Small and Valentine were running with the ones and Heiman was running routes with Landon Root as QB. Heiman is huge, but he lumbers downfield. Small and Valentine look to run better routes and Small, especially, looks like he has some speed.
Defensively, I saw a lot of the same things that pvegs saw. One that stood out was "Honey Bear" Bryce English. He was unblockable and has a motor! During one drill, he got underneath Risner, stood him up, and drove him 4 yards back. I would be shocked if he does not get a significant amount of reps this year. I would use him on passing downs specifically or between the 20s.
Another one that stood out during team time was Marquel Bryant; he looked fast and hopefully he has a breakout season. Davis Clark, which I have never heard of until the Spring Game, was impressive too.
Newlan at safety was a bit surprising, but he looked the part. It looks like Donnie Starks may start or at least split reps at nickel back. I did not see anything noticeable in concerns to the defense, but I was focusing primarily on the offense. However, during special teams, one caught my eye, Jayd Kirby. The kids is big and fast. He looked physical and I would not be surprised to see him starting on special teams and being in the mix as a reserve linebacker.
I have also heard that Darreyl Patterson is still on the team and he was on the Fan Appreciation Day roster card.
It was only an hour long practice, but I believe it provided some insight into who may start and/or get playing time.