So, judging from what I seen (all group stage games and QF highlights), quick thoughts:
Goalie situation is definitely on coaches: at first, they defined that Melnichuk and Berdin are the guys to go, gave them starts in the exhibitions and then we are going with the 3rd goalie as the starter. I don't have anything against Sukhachyov and I think he did more or less fine, but that whole situation doesn't sound normal to me.
Defense was actually more or less fine, I expected it to be way worse, so I don't think coaches are the ones to blame here.
Forwards... here is the biggest disappointment. Sokolov was bad, unfortunately I must admit he shouldn't be there at all, and definitely not on LW... Manukyan actually too, but we didn't have any other right-handed forwards. Abramov was looking very active in the first games, but later it looked like he totally lost his confidence... to be honest I also have here questions to coaches, as I think he could do better with other linemates.
Sholokhov... again, questions to coaches: why wasn't he taken to the SuperSeries? Probably because coaches didn't count on him (and Bragin himself mentioned Rasseikin as the guy he would like to see on the roster). And again, the situation when a written down player centers the 3rd line is very very strange. Not to mention that, iirc, he played center much less than Abramov this season.
Maltsev's line wasn't that bad actually (ok, I'd like it to be better defensively), it created some movement in the attacking zone, but it's just not a first line, it is a decent middle-six line.
Rubtsov was actually a positive surprise, Kayumov more or less too, they were able to find some good chemistry again rather quickly.
Ivanov's line (or should I say Kostin's line) was probably our most dangerous weapon, but I still have a thought that we should've tried to build a proper first line around Kostin (also to get him more icetime). For example, Kostin-Rubtsov-Kayumov.
Overall, those lines and line changes were made like they were counting on good luck. PP was non-existing, PK was actually fine.
So yeah, actually a lot of questions to coaches, probably I can continue with those and maybe it would be a good idea to give some rest to Bragin, but the issue here is that if it is not Bragin, then rather likely it's Golubovich and I doubt that we will like it.