Though I'm living in QC City and that would be fine to have NHL games back there, I don't think it does make sense for the League to have a team back here for several reasons.
Franchise market
The NHL would not only have the smallest market in the League, but a french one which is a serious drawback when it comes to market the franchise. The amount of revenue would quickly reach the ceiling with little to no room for improvement. I know the Jets also have a small market but they have a more centered location with passionate fans. In Québec we are not only isolated on the side of the taiga, the mentality is quite different. If the team isn't immediately competitive, the interest will quickly fade in a population that has already turned into Canadiens or Bruins fans, especially for the new generation.
Politics
There is no other franchise in the NHL that is more glued to politics as a potential one in QC city. I t was already the case back in 1995 when the government was directly asked to fund a giant project that would have kept the Nordiques in Québec (for how long? Not much IMO) but the deal fell apart. I'm not comfortable with the idea of taxpayers saving their pro sports team at 100%. Now the boss of Québécor (the owner of the new arena and the eventual franchise) is a pro Québec sovereignty, ran for prime minister and is the direct concurrent of TVA and Rogers, who have the broadcasting rights of all NHL games. Like Pepsi vs. Coca-Cola. Not an ideal situation. And the least thing that the League wants is political involvement.
Rivalry
The return of the Habs-Nordiques rivalry was often mentioned at a time when the NHL wants to build as much rivalries as possible, but both teams have only met for 16 years. The true natural rivalries are Habs-Leafs and Habs-Bruins as part of the original 6 teams. Again, these games would only draw attention in the QC province and not elsewhere, which again means less money in the League's pockets.
Marketing
When The Golden Knights and more recently the Kraken were announced. The amount of merchandising efforts and items are generating millions of dollars. Seattle won't play before 2021-2022 but they are already selling a lot of stuff. Would it be the same for an eventual Nordiques 2.0? I doubt it. Outside of the Québec province, they won't draw much of attention and enthusiasm except for some nerds and nostalgic hockey fans. And the objective of the League is, for and foremost, make as much money as possible.
Buttman & Co. of course didn't say it that way, but it was obvious from the very beginning of the expansion process that they were cold as ice with the idea for having QC City back in the League, and for a lot of good reasons. I think they correctly did their homework on that folder. Unless an extraordinary set-up of circumstances beyond any logic, QC City won't have the NHL back. With Seattle, all four divisions will be perfectly balanced and from now on, any potential move will be avoided as much as possible.