If you think Steen has dropped off, then you might have missed Pacioretty's last season. He was very not good. I think he has a greater chance to bounce back, but there are obvious question marks.
Among Schwartz, Steen, Fabbri, and Berglund (even though he has a chance of being moved), the Blues have good left wing depth. If Fabbri is even 70% of his former self, he's a fine 2nd liner behind Schwartz.
Nashville is the only team that made it deep into the playoffs with remarkable performances from multiple left wings. As long as the Blues can stay relatively healthy, left wing is not an issue - and if they do acquire one, at least one has to leave.
As far as forwards go, the Blues don't need an entire top-6 line, they need two of these: a scoring line center, a scoring line right wing, or for their youngsters to develop into those roles. I'm not against acquiring Patches or some other left wing if the price is right and that's what it takes to upgrade their scoring, but I think you're way off. You must be assuming that Steen is going to get even worse and that Fabbri is going to be basically useless. That's possible, but even if it does, their left wing situation will still compare decently to recent deep playoff teams.
I think we can agree that the Blues have lots of depth on LW.
I think we can agree that the Blues don't have much reliable quality depth in the top-6. I'm not satisfied with putting a warm body in those roles. And I think I've made clear that, while I'm open to trading for Pacioretty, he's not my top choice.
Fabbri may surprise us all, and I've said plenty about that elsewhere. But I'll reiterate my position: he needs to be playing sheltered minutes as a utility forward, perhaps spelling one of Kyrou or Thomas who will need the same treatment for different reasons. That will give him a chance to regain confidence in his game and put him in a position to succeed, rather than risking re-injury by jumping back into first line minutes.
As for playing rookies in top 6 roles, I'm actually ok with the idea, in the scenario I just described where their minutes are being closely monitored, and they're being cycled into the lineup to better facilitate their acclimation to the faster game and continued development. But as dedicated to this youth movement as the Blues claim to be, I don't see Yeo wanting to take the time to hold the hands of these young players. Also, every time I've penciled in a rough roster that had *any* of our prospects in the top 6, I've been soundly scolded by the peanut gallery for having done so, so I've picked my battles and assumed any rookies who make the squad this year are destined, at least initially, to 3rd line duty.
But back to new acquisitions: the two guys I most want the Blues to acquire, Draisatl and Skinner, aren't likely to be dealt. Acquiring Draisatl will almost certainly take Parayko, who I'm not thrilled about losing, while Skinner would almost certainly require Kyrou, who is also on the short list of players I would be reluctant to trade. But I think both those deals are feasible, if Doug Armstrong has the stomach to back up the claims he's recently made public. And the Blues with Draisatl AND Skinner would be a force to reckon with in the Western Conference, no doubt about it.
O'Reilly is another option who would also be difficult to acquire, and it's doubtful Buffalo will retain any of his salary. It's also unlikely that they have much use for any of the players we might prefer to send back in a package for him. As ideal as he might be for the Blues' needs, I don't think Buffalo is a good trade partner. But stranger things have happened.
Ottowa was digging in at the deadline, wanting one of our coveted prospects for Hoffman, but perhaps they would soften their demands if we agreed to take Ryan and the better part of his salary off their hands. Like Steen, Ryan has lost a step, but he brings other intangibles, and would be a good talented veteran to pair with a rookie center. I also think Ottowa *might* be persuaded to take Allen off our hands, IF Armstrong is inclined to make that happen (not claiming he is).
Obviously, the possibility of signing Tavares factors into all of this. I hope it happens, but not holding my breath. Having an elite LW to play with, like Hoffman or Pacioretty, along with a sniper like Tarasenko, might be what it takes to convince Tavares to sign with the Blues.
So, while Patches isn't my go-to dream acquisition, I think there's a chance he could be had for a more reasonable price than some of the other options on the table. And while his performance last season was unimpressive, I would be willing to bet that playing with Tarasenko (and, dare we say, Tavares?) would help reinvigorate his game.