Seems like a rather unique look on the discussion. Is there any particular reason you feel that way? I mean for me it just boils down to a nice jersey is a nice jersey.
I'm just not a fan of a team being stuck with a look that is already associated with a previous era that the book has already been closed on. It is different for teams like DET/MTL/CHI where they've never changed their jerseys and by never ever changing their jerseys they become larger than life. But those are the exceptions to the rule.
I think it is a disservice to fans and players that instead of giving them their own look and the responsibility that comes with making that jersey/logo important by succeeding and in turn defining the era of the team they are currently participating in, they get given a look that the book has been closed on for decades. It's like saying "this team isn't good or interesting so please wear the jerseys you wore when I was a kid so that I can fantasize about that team and the way it made me feel when I was 12". It was fine for Alfie night, because that night is all about fantasizing about and respecting things that happened in the past, but I think going back to a dead jersey from a different era both from a marketing perspective it is lazy, and from the perspective of a fan emotionally investing in a team it is lame and uncreative.
If they are going back to the 2D, at least do a full new jersey design like the popular red one that gets retweeted. But still, I'd like to see them just leave the 2D logo in the past. The Heritage design is new enough that there's still room to explore a red home jersey/white away jersey as the main set, and as the big marketing and branding change that'll help define the team as they move forward to being a competent playoff squad lead by an older captain Erik Karlsson.
Keep in mind, that if this team is successful, whatever branding or look they move on to, if they keep it for as long as they've kept the past jerseys they've had that'll be the look that defines one of the biggest stars we've ever had Erik Karlsson's career if he stays with the Senators and if the team is even remotely successful. That is the jersey people will imagine Karlsson and other stars like Stone in when they are thinking back to them (hopefully) winning the Stanley Cup. That's a big responsibility as far as a jersey design goes and I think it does the team a disservice to not give them an opportunity to have their own logo, brand, and look that they can define and make important by winning with it on because fans want them to wear a design that other players who are now out of the game already got to define.