If 3 or 4 teams are strong and the rest of the league is weak, it's going to hurt the strong teams too.
The Wings are in a down trend while they reload and wait for a couple prospects to mature. We saw the same thing between 98 and 02, and again between then and 08. Team starts losing more, fewer fans watch. Team wins again, people pay attention. The same is true of the Tigers, Pistons, and most other teams in other cities.
Maybe maybe not, like I said if the Wings are doing well I am happy. There are 30 franchises in this league so it's natural that some are doing better than the others. No, it wouldn't hurt the Wings why should it? To be honest it's absolutely irrelevant how others are doing. Think about it this way; the Leafs are posting record numbers and are the only team on the forbes top 50 list; relevance for this team still 0. It shouldn't matter, how the opponents are doing they are enemies and the goal is to be netter than them and return to former glory. If it means only a few strong markets and less competition so be it.
Guess what the Blues are going to re-sign Pietro with money out of Ilitch pocket, so that's a great player who would help tremendously not hitting the market supported by money from an opponent I fail ro see the benefit here for a team like Detroit. Another point being, a guy from his caliber would also increase the popularity of this team again.
So I am not going to care for opponents or franchises that can't survive on their own, period.