The big thing is building the depth. I said before the season, I liked MSU's starting 22 better than last year, but they certainly lost more than they brought in through the portal, and the depth concerned me. That proved to be the case because while I don't think their total injuries were out of whack statistically, they were heavily concentrated in the defensive back seven.
The DL was ok against the run, but couldn't generate any pressure, and by the end of the year, MSU was starting a walk on true freshman at nickel back. Purdue probably would have beaten us if Walters had realized earlier that he was passing against the worst back seven he had seen all season. And even not realizing it until the second half, it took a dropped deep ball by a wide open WR, and an interception on a pass that was tipped 3 times for MSU to hold on.
I think the ongoing issue is going to be that aside from QBs, interior DL is going to be the most expensive positions in the portal. MSU lost their two starting DTs to Oregon and Miami respectively. I think they can build some depth in the back seven, but I'm very concerned about the trenches going forward.
The offense should get better, simply from OL improvements. I think Chiles is back, he was already well paid to keep him from USC, and I can't imagine this year has increased his value. Nick Marsh is well paid, but turned down better money from PSU because he's an MSU fan, and he likes Chiles. "Better money" might become "silly money" this offseason, so it will be interesting to see if he stays.