To me, right now, this has the feel of a team where its sum will potentially be less than its individual parts might suggest.
I see an forward group that could potentially be explosive, but the cost is a top 9 that is liberally sprinkled with players who are prone to defensive gaffes, or who are not known for being particularly good two way players, or who are still growing defensively (Hoffman, Perron, Schenn, Kyrou, and Tarasenko). I can see this group being aggressive, but I don't see them being good enough in the defensive zone to compensate for any defensemen defensive deficiencies. That could be alleviated by subbing in and/or moving up some of the depth players in the lineup, but at the cost of neutering some of that potential offense.
I also see a defensive group that is decidedly more vulnerable in the top 4, both in defending and in ability to transition under heavy pressure, than it previously was when the Blues won the Cup. The ROR and 4th line did a lot of heavy lifting defensively during that Cup run, but the defense covered up a lot of defensive mistakes from the other two lines, and the defense's ability to transition under heavy presssure was a big part of their ability to generate/sustain offensive momentum, not to mention to reduce some of the pressure on Binnington (relatively few extended shifts hemmed in their own zone, etc.).
That combination suggests to me that Binnington is going have a tougher task this upcoming season, as well as more pressure if the team in front of him isn't supporting him the way it did during 2019.
Bottom line, I'm just not sure the strengths of each group are as synergistic as they previously were, and I'm not sure how Berube can adapt things to alleviate that.
I don't think it's hopeless, though. Far from it.
There is a lot of forward talent to work with and a number of rather good depth role players that can be mixed in. Berube has a lot of viable combinations that he can experiment with as he attempts to find lines that synergize well internally, and with the greater whole.
Among the defensemen, there's legitimate room for hope that one or more players might step up their games in a significant way this coming year, and there's also hope that Berube can craft a system that minimizes their increased vulnerability, or that the offense ends up being explosive enough that it adequately compensates for any losses defensively, or that Binnington is such a brick wall that it doesn't even matter.
I'm not particularly optimistic myself right now, but it's not shot in the dark stuff, either.
Whatever happens, it should be an interesting year that gives us a lot of insight into the team's competitive core, Berube's tactical range as a coach, and about whether the direction Armstrong steered this team in looks to be a truly viable one.