Quoting: Xspyrit
Okay "dude"
Sheltered by playing with Josh Brown (barely NHL level) or Nick Holden (the declined version)?
https://moneypuck.com/lines.htm
Brannstrom has rocked with Chychrun, Sanderson and Hamonic (however small sample sizes) but also with Zub. Even had a 56.2 xGF% with the declined Holden
What was his QoC last season? He played higher in the lineup when Chabot was injured and looked even better than behind those guys
And it doesn't matter if the Blues need him or not, I was simply replying to your point "weak defending"
Yes, when one plays about 13 5v5 minutes per night predominantly on the 3rd pairing, that is the definition of sheltered. So yeah, Brannstrom faced low quality of competition apart from the 22 games Chabot missed.
And you keep leaning on on-ice xG stats but avoiding actual goal share. We can talk about how well he supposedly played with Chych and Hamonic and Sanderson, but as you noted these are incredibly small sample sizes.
W/ Chych 5v5 = +3.... for a whole 18 minutes.
W/ Sanderson +3... but that was only 32 minutes.
W/ Hamonic +4 in 57 minutes.
That's roughly seven games of work combined we're talking about. Out of 74 games played. Now he did play 165 5v5 minutes with Chabot, but was -5. Meanwhile, he was a -2 with Zub, -4 with Zaitsev, +1 with Holden (who was his 5v5 partner roughly 45% of the time), an even with the other four D he played small amounts with. He did not play a single even strength minutes paired with Brown.
So the guy has played 190 NHL games, with about 90% of his minutes third pairing and 56% O zone starts and he's a -18 overall, he's definitely been sheltered because his defending was weak. Is it stronger now compared to where it was? Of course, he undeniably, finally figured out at some point last season that he has to play 200 feet and adjusted his efforts accordingly.
Has he suddenly risen to the level of an average quality defender in the NHL? Nah. We're not there yet. If he's below average, that's weak.
And yes, it definitely does matter what the Blues want because that's the lens they'd look through when considering the proposed Brannstrom trade in this scenario. They want a top 4 quality Dman whose primary objective will be defending in dirty areas in front of goal, then Brannstrom is obviously not someone who measures up in the defending aspect of the game.