This is how I would "retro-vote" the Norris winners in the 1980s:
1980
Larry Robinson
I agree with this actual "win".
1981
Denis Potvin (actual 2nd)
Carlyle winning this remains utterly bizarre. Like... what were people thinking?
1982
Larry Robinson (actual 5th)
This is one of those seasons where it's hard to choose. Bourque and Potvin probably missed too many games apiece for either to win, so they're out. Doug Wilson won mainly on account of his eye-popping 39 goals (which is certainly impressive), but he was also the anchor of a very high-event team (not a very good one) that gave up a lot of goals against. And since he was outscored by 4 points by young Coffey, whose team and ES results were vastly superior, why give it to Wilson? I go with the the veteran, Robinson, who anchored the best defensive team of the entire decade (or at least until '89) and also contributed a lot of offence. Hartsburg was good, too -- maybe's he 2nd or 3rd.
1983
Mark Howe (actual 2nd)
The two best D-men at this moment were probably Ray Bourque and Mark Howe (Coffey rising). But Bourque (again) missed a few too many games (Potvin missed some, too). Langway no doubt was really good, but Howe was just as good defensively and vastly superior offensively. So, I'd give to Mark Howe, with Langway maybe 2nd, Bourque 3rd.
1984
Paul Coffey (actual 2nd)
Toss-up between Bourque and Coffey, but since Coffey's team improved a bit and Bourque's declined a bit, and because Coffey was the first Dman since Orr to score 40 goals and 100+ points, I'll go with him. Bourque a very close 2nd. Maybe Potvin 3rd, as this was sort-of his last monster season. Langway won this one, which was overkill. In reality, he was maybe 5th.
1985
Paul Coffey
I agree with this actual "win". The more so in that Potvin started to decline a bit (he was still awesome, mind), Bourque's team was entering a two-to-three-year decline (Coffey doubled Bourque's plus/minus), and Howe provided less than half of Coffey's offense. By the way, voters really crapped all over Potvin this season---as the Islanders fell in the standings---as he didn't get a single Norris vote despite a 68-point, +32 season!
1986
Mark Howe (actual 2nd)
Controversial, perhaps, as Coffey broke Orr's goals record (and "primary points" record), but the Flyers were close to Edmonton in the standings and Howe's ridiculous +87, with well over a point per game, was tops in the League. Order here, maybe Howe --> Coffey --> Robinson.
1987
Ray Bourque
I agree with this actual "win". And I think the Bourque --> Howe --> L. Murphy order was exactly correct. See, people?? Larry Murphy was awesome long before he went to Pittsburgh.
1988
Ray Bourque
I agree with this actual "win".
1989
Chris Chelios
I agree with this actual "win". But Coffey shouldn't have been 2nd. It should have been Chelios --> MacInnis --> Bourque (who missed 1/4 of the season).