Optimism is a fine thing, but a note of caution here. Iowa loses 5 of 11 starters from this year's defense, including at least 3 defensive line starters. Yes, the Hawks this year had a nice rotation, but I attended 6 of the home games and it was quite remarkable how on alternating series how the '2nd team' line of Epenesa, Gholston, Lattimore, etc allowed the opponent to drive into Iowa territory, and then the '1st team' unit made up of Seniors would be inserted to try to put out the fire. It was encouraging to see the '2nd line' play more and more as the year went on, with Parker obviously wanting to get those guys as much experience as possible heading into next year. LB Colbert is excellent for a FR, but Phil has GOT to find a way to get Welch off the field and Neiman onto the field. The safety and CB positions will be as deep as I can ever remember.
I know you can point to 5 starters being seniors. That being said....
Hockaday didn't start the year...and missed 3-4 games with injury. I don't think you lose a thing with Welsh/Neiman on the inside...and watch out for Doyle too. This will be an upgrade.
The other thing is that Epenesa over Hesse will be an upgrade also. I love Parker and he was very good...but if you noticed in the last few games...Epenesa's snap count went up and it wasn't just in passing situations. He's proven he's a great run stopper now. Another spring and fall camp...beast...and a serious upgrade to me.
Gervase played well, no doubt. He was very good in run support and was a very good player. Stone, in my opinion, will be an upgrade. He had a few growing pains (Purdue), but damn, he's a playmaker similar to Hooker. He sees something and is aggressive making the play. He's also 210 pounds and hits you. I think this is an upgrade too.
Now you get to the two defensive tackles. This is the unknown, other than Lattimore, who really hasn't delivered as I think everyone expected. Similar to Brinks this year as a senior, I think Lattimore makes an impact next year. The other tackle spot I think goes to Nixon. He's had a full year to get stronger, and learn the position. He's big and has quick feet for a guy that big. The other guy I'm excited about, is Linderbaum. He'll be 290 next year is my guess and if he was legitimately in the mix as a true freshman...well that says something. Reiff and Shannon also factor in here. Personally, I think we will be better at DT too. Matt Nelson was solid and really played well and under the radar...but I think these guys coming up...have a higher ceiling.
So, I get we lost 5 starters, but you can make the argument that we will be better at definitely three positions, and it could be all of them if our young DT's perform. Reese has proven he can get guys playing at a high level. He now has natural size to work with too...Nixon, Shannon, and Linderbaum.