This is a very very very small sample size obviously, but through 2 days in college basketball, EvanMiya (analytics site) has Iowa's starting 5 as the most efficient offensive lineup in the country and it's not even particularly close. And yes, his rating system adjusts based off the quality of opponent, so it's taking into account that they played North Dakota.
It even indicates that this lineup was a better defensive lineup than the Dix + Freshmen lineup. Both were slightly above average, which would be a huge step up from last year if that holds.
Frankly I think it's a bit premature. But that lineup averaged 1.64 point per possession last night which is ELITE. For reference, Garza's last year when Iowa was 3rd in the country on offensive efficiency was hovering in the 1.16 ppp range for the year and on good nights the good nights they were peaking around 1.5 ppp. So I'm going to struggle to hear any argument that these guys shouldn't be playing together when they are scoring at that high of a rate and the numbers don't even indicate that they are bad defensively at this time. Maybe that will change in the future, but right now that's the best lineup.