The whole debate about production tied to value that I've seen here is flawed, the rationale for it is flimsy at best. What Domi has done in the past is an indicator of past performance, hints at his future performance in good part too, but his ceiling as a player isn't completely beholden to his previous stats, the same as each and every active sportsman.
Though it isn't the likeliest outcome by far, it is entirely conceivable that Domi could somehow find another level to his game and explode offensively for the next few years ala Marchand. It is also possible that he loses a step, grows soft, gets injured in some way, stops competing, etc., and falls off a cliff performance-wise until he isn't even a decent NHLer anymore, like what happened to Alzner.
In a nutshell, labelling a player as a ''30 goal-scorer'', ''50 point center'', ''PPG player'' and earmarking the value of that player by only that aspect, as some have done in this thread, is just disingenuous. You have to look at all of a player's facets, not just the stats. From there you can more or less gauge if you'd trade package X for Domi or not, it's not my place to interfere with your own internal evaluation process, just saying that Domi is much more than a 50-point forward, in good and ill.
Personally, I consider Domi a good secondary offensive producer, a guy that's feisty, skilled, smart on the ice, fast, has an above-average shot, works really well in a top 6, and one that could produce quite a bit of offense if he finds chemistry with teammates that afford him more space to move. Inversely, I don't like the fact that Domi pouted last year playing wing, how he was visibly less engaged last year than in '18-'19, his diminutive stature, cocky SOB demeanor off the ice, the fact that he can be a massive hothead, cost us games with jaw-droppingly dumb penalties, and the fact that he is an attention-grabber. Weighing the good and bad, the good massively wins out, obviously.
Thinking about it more, I think I could live with the trade but I'd like for us to keep Domi as I really like him as a player. But I can see that Brodin would help us quite a bit even though he isn't exactly the type of puck-moving LD that we desperately need. I just don't know if the fit is quite as obvious as OP makes it seem.