This is a good summary. If we could somehow blend the "back-slapping" personality and fundraising ability of RG with the marketing mindset and just a bit of the "coldness" of MT, I think we'd be in a pretty good spot.
I'm sure I'm in the minority here, but one thing I will say in defense of RG is that I can't really complain about his hiring choices at the time. His problem was that he stuck with them for too long. I'm not old enough to know the details behind Tepper's hiring, but I'm not sure if that was his or Mackovic's decision. But looking at Turner, Zook, Kruger, Self, Weber - all of them were good hires at the time and led us to some level of success. If I recall, it's also not like we were the only suitor for any of them at the time either. RG's problem was that he was too emotionally tied up in his coaches and he stuck with them too long. Even if he didn't hire him, it was clear after 1994 or so that Tepper wasn't going to cut it, given what he did with the talent he had. Turner should've been gone in 2003, Zook in 2009, and Weber likely in 2010 or 2011. One thing RG did well is advocating and selling coaches on how they can succeed at Illinois. Clearly MT wasn't able to do the same thing. But MT was much better at the marketing and overall fan outreach aspect, especially beyond the top level donors.
A return to certain aspects of the RG era isn't a bad thing necessarily. We need those big donors to be happy, just not completely running everything.