I guess it depends on who you ask, but I would argue that progress HAS been shown. I understand he took over a "loaded" roster, but talent means nothing if it doesn't fit your system. As a result, we cant use Saban as a baseline. We instead use his first year as a baseline, which honestly wasn't as bad as some make it out to be. If the committee had only done their job and actually valued SOS, we would be talking about DeBoer in a completely different light, because it would be 2 playoff appearances in 2 years. Even so, he definitely made noticeable progress form year 1 to year 2, and really improved in about every area he needed to, except for the OL, but I think we may have attributed too much of the OL issues to QB and assumed a new QB who didn't roll out into the rushers half the time would fix the issues. The focus this off-season has been on the issues in year 2bthat needed to be fixed, so this is definitely promising.
I see extending him as a pretty safe move. With the way he is recruiting, there is very little risk that he is just gonna run the program into the toilet. I know he will ultimately be judged on how many natties he wins, and people will get impatient if he makes the playoffs most years but does not win a natty, but it's not really any harm done if that's where we end up at. I do think DeBoer has a very high floor, so imo this is a pretty safe extension. Whole I personally believe that he will win 2 natties in the next decade, I also feel pretty safe in saying we're not gonna become Auburn under him, even if he does fall short of my prediction.