First impression is that this is probably the most versatile Illini team in recent memory. Mirkovic's ability at 6-9 to do everything as a point forward gives Underwood the ability to do some mad scientist stuff with his lineup combinations. That ranges from going really big with Mirkovic becoming a 3 to going to a four-guard combo with Mirkovic becoming a 5...and everything in between. If this truly is a better shooting team as advertised, most opponents will struggle to counter the different combinations.
On the defensive side, it looks like more pressure on the ball and a lot fewer times trailing the ball down the lane. Might mean more 3-point opportunities than before, but fewer high-percentage shots in the lane or at the rim. The defensive rebounding was impressive as ISU got only 5 second-chance points. The Illini gave up only 3 fast-break or runout points despite the normal first-game mistakes. I get that it was Illinois State (thought they might be a NCAA team out of the MVC), and the Redbirds were missing two of their better players. But the Illini were missing three of their better players.
Other quick impressions: Wagler is really impressive in all facets of guard play; Lee may be small, but he looks skilled and really tough; Z's 3-pointers are a thing of beauty, even his misses

; Boswell looks primed to have an all-B1G season; Ben looks to be a better version of himself. I am excited to see the whole thing operate when Tomi, Pavlovic and Stojakovic are ready to go...not to mention the X factor that is Ty Rodgers. If I get worn out typing all that (or anyone reading it), imagine what opposing coaches and players must feel preparing for and facing those different combinations. Might be even more pronounced in a tourney setting when there is less time to prepare...