An interesting question is how far do these moves get us in terms of being contenders again? This is mostly purely speculative, but there is an element of predictivity involved as well.
Around the draft, Chace McCallum wrote an interesting article regarding draft values at LWOS. In it, he argues that the NHL is a "strong link" game, where elite pieces are more important than having a "high floor" team. A good team in a "weak link" sport, conversely, is only as good as its weakest link.
Using the NHL Draft To Acquire Strong Links and Draft Pick Value Charts - Last Word on Hockey
You can read more in depth at that article, but one of the things he attaches is a Goals Against Replacement (GAR) metric spreadsheet. I don't think it's a foolproof calculation, there are are a few outliers that don't seem right to me. But regardless, it's good enough for a back-of-the-napkin calculation: Which teams have the "strongest links"?
So basically I went through and changed everybody's teams to reflect who they play for after the FA Frenzy this last weekend. Then, I calculated the sum goals against replacement generated by each team. This is what I got:
Team GAR
PIT 108.7
PHI 107.4
WPG 107.3
TOR 107.2
NSH 106.8
VGK 106.5
T.B 106.1
STL 104.6
CAR 104.1
FLA 101.2
MIN 98.8
S.J 98.7
ANA 97.1
WSH 96.1
BOS 95.7
CGY 92.3
CBJ 92.3
NYI 90.1
COL 87.6
DET 83.2
EDM 81.5
CHI 81.1
N.J 80.0
DAL 79.3
NYR 75.1
ARI 74.5
L.A 72.1
MTL 71.2
VAN 69.0
OTT 62.2
BUF 49.6
So, for Western Conference teams, the Blues are right up there with Winnipeg, Nashville, and Vegas. In terms of forwards, we're actually only behind Winnipeg, but Bouwmeester and Gunnarsson boat-anchor us down relative to other teams' d-groups.
A few more important things: Robby Fabbri isn't included in the chart. Depending on how he comes back (and I'm hoping for a Mattias Janmark-esque return), he could help close the gap between us and Winnipeg. Pat Maroon has a GAR of about 8, so he would help too. It might not be that simple though, because Laine's GAR in this chart is only 5.1, which seems incredibly low to me - it's on par with guys like Coyle and Guentzel.
Armstrong's moves really, really helped us this weekend. We went from Berglund, Sobotka, and Thompson (2.9, 0.2, No Score = 3.1) to Perron, Bozak, and O'Reilly (6.9, 9.9, 17.2 = 34). That is a ridiculous improvement in terms of strong links. The table above suggests that we are among the best in the league right now.