Rather than list all the guys who looked rusty or bad, I'll comment on the positives (which are fewer):
Lehtera is going to be an effective NHL player. He was one of the few guys who really looked ready to play.
Backes elevated his play when the team was languishing mid-game.
Elliott did a good job. Two of the goals he gave up were on chances of much too high quality. The Blues can't allow skaters to get those kinds of looks (the breakaway and then the St Louis play at the end, which was off a bad bounce). Other than that he stopped things he should, and wasn't giving up bad rebounds.
I'll say it, I really liked the 4th line last night. The Blues needed a jolt of physical play, and they brought it. When the team looked timid and was getting badly outshot, I felt like Ott's contribution mattered. I noticed Berglund did a shift with the 4th line, I assume to try and get him playing physically and with energy. I also noticed when Oshie was serving his penalty, Ott was the one that took his place....and that the line looked dangerous. He's not here to be an all-star, but I didn't see bad Ott out of position making turn-overs. I saw a solid contributor.
I'm disappointed in the PP. Maybe they just haven't spent as much time working on it yet. The first month is light, so there are more practices than usual to iron out things. Maybe the PP needs some attention. I'd rather have a really good PK than PP, if I can only have one, and I think that's Hitchcock's opinion, too. The PK looked bad pre-season, but I assumed it was personnel.
Loved Lindstrom's hit along the boards just prior to Stastny's knee hit, and then Lindstrom jumping in immediately.
I'm concerned the team may not have enough scoring.
I kept thinking I was seeing Sobotka out there making plays. I loved that take-away he made that led to the Tarasenko/Stastny goal. (Yeah, it was Schwartz, but I was thinking Sobie.)
As for articulating problems:
I think the defense and the forwards were not in sync. Bad gaps, and the defense wasn't properly covered when they pinched at times. The transition wasn't sharp and there were lots of bad passes. Good news is those are all things Hitchcock is very good at addressing.
Calgary plays a more physical game, so the Blues are going to have to show up for the game. I think a physical challenge will be good for the team. Still won't be surprised if they lose the next one, though.