Danny's stats were mediocre in large part because he was the fifth option (through no fault of his own). Later in his career (particularly in Sacramento) he was more of an all-around player, who played at an all-star level.
As for the argument of "what if the Celtics collapse from here?", I don't really care. The three year run we've had (regardless of what happens this year) has made Danny an overwhelming success as a GM. He came in and transformed a mediocre team in decline into a title team, through great drafting and smart trades. If the Celts never sniff playoff success under Danny's guidance again, he's still done a good job, and a better job than most.
A clearer argument for why it is completely premature to discuss raising him up with Auerback, Bird, et. al. could not be made:
5th option (or higher) as a player; good job, better than most as a GM doesn't exactly cut it.
Well, if you're conveniently going to leave titles and Finals appearances out of the picture, yeah.
Out of curiosity, where do guys like Loscy, Reggie, Sanders, Nelson, etc. fit in your analysis? None of them had overwhelming stats, and outside of Reggie, they were never the top options (or even close to the top options) on their teams.
I mean, we're not talking about retiring Ainge's number for a hypothetical franchise. This is the Celtics, and they have a different criteria than other teams.
Starting to go in circles here...
Count the banners for those guys that played in the '60's (or look back a couple of pages in this thread). The lowest was Satch with 5 rings (matching Magic Johnson's success), and the other have more than MJ. A clear argument can be made from the sheer number of titles that they were important pieces. Danny's 5 points off the bench in '84 don't exactly scream out "retire the jersey," and he played with FIVE HALL OF FAMERS in '86, though his role (3pt shooter) was clearly important, and he was good at it. Add in zero all-star appearances as a C, and zero all-NBA-anything honors as a Celtic, and it's clear he wasn't the player he is being remembered to be.
When we start hanging conference championship banners, which we never will, then we can start counting Finals appearances in considering whether to retire a number. Let's not lower our standards that far.
The championship banner itself represents that year's team success. There is no need to single out every role player on the roster that becomes a sentimental fan favorite for individual recognition in perpetuity. Greg Kite and Scott Wedman got two rings in the '80's, too.
Reggie Lewis was/is a controvertial retiring of a jersey #, definitely a sentimental call, but on the other hand, after a player dies while wearing it, would anybody want to wear it again anyway? (a politically incorrect thing to bring up there, but still...).