Random thoughts and guesses -
I'm not sold on Matelau and Martin. Hope it doesn't play out but B1G D-Lines are a very tough deal for an OL. Next year, yes. This year
I think special teams will be just fine, not a top B1G group but very solid. I'm more optimistic than most.
Hauser should be excellent. Illinois did well with Altmyer and his shortcomings. Altmyer's interception this past weekend was because he threw late...again. Still doing it and yet at Illinois he was fantastic. Hauser solves some OL issues himself getting rid of the ball quick, which will really help with the above OL concern.
Hauser - going to be treated at practice like grandma's fine china. Do not touch. Lose him and it's a problem. Zero experience at back up. Keep him healthy, get him out once Illinois has a game wrapped up, forget style points unless some crazy scenario occurs where Illinois is in the playoff race (not likely, IMO).
Speaking of Hauser, has he bought a "Barry Hauser is my Dad" shirt yet? He should and Illinois and the Band should play that up. Maybe be a guest conductor wearing that T-shirt. The band kids work extremely hard and I suspect would really enjoy some QB love. Tie them even more into the program.
I'm concerned, like many, that cumulatively the front 6 on D is a very very marginal B1G group. Individually they are fine but collectively.....The top guys are not there. I'm wondering if Hauck & Co. are wondering what they got themselves into? Worst Case, at least year 2 they'll have a better opportunity in the portal. I'm sure Bret and Josh will throw more money at it. Best case, this group exceeds expectations and keeps it close enough for the Illinois O to win most games.
Not having to get Feagin touches at RB improves that whole group. Getting Feagin touches at TE (or wherever he lines up) improves that whole group. That's a big positive for this offense.
I'm not sure what to make of the WR group yet. Stepp is good, is there enough B1G depth talent there? We will find out but it does make it more important for Illinois to be better at running the ball.