Also - want to point out an observation I made.
A big thing for rookies is learning from their mistakes. Sergachev - in either the first or second game - was lacksadaisical behind the net against a forechecker and got the puck stripped off his stick, leading to him taking a penalty to prevent a scoring chance.
So a big lesson here is "do not repeat this mistake". But just as interesting to me is how he doesn't repeat that mistake.
One option - and I think the most common one - would be to suddenly move the puck much more quickly when faced with a forechecker either to your partner or to one of the wings. At times - this is the right move, but ultimately it limits the options of the breakout because you're pressured into making a decision.
What Sergachev did - and what I think is the right move with his skillset - he's still carrying the puck out against the forechecker. He's doing a better job of protecting the puck in those situations, and he's moving with a little more jump (there was a play I think it was last game or maybe the one before where he just kind of threw the puck about five feet ahead of him against a speedy forechecker and skated to it instead of keeping it on his stick). This allows the rush to come from the center of the ice, which forces the D to cover all 80 feet of the blueline to prevent entry instead of starting to collapse on one side.
It's a small adjustment, but it's the right one. And it shows that not only is he aware of his mistakes, but he's taking the right lessons from them. It seems like such a minor thing, but after seeing Sustr shit his pants every time he sees another jersey coming toward him for almost four years, seeing that type of quick development makes it hard for me to not be excited about this kid.