Pretty much every move made has worked out so far or has at least been neutral. Also, the team on ice in terms of how they play looks much better this year, at least so far. Whether that is new players, Green, maturation of existing players, or some combo of all three. Or it's just a small sample size. And they've had some bad luck in terms of injuries for this early in the season and still look good (Zub, Linus, Pinto, Perron, Greig).
You can't judge someone like Chychrun as a 26 year old Top4 D, without context. The context being that he duplicates existing roles (style/shot), played pretty badly as a Sen and was soft as Charmaine for a liver eating hulk. Is injury prone. And he's due for a long term commitment.
The third and fourth lines, as well as the D, look better without Joseph, Kelly, Brannstrom, Chychrun. That might not be because they are bad, but might not be the right fits here in Ottawa. The GM has to figure that recipe out. So far it looks like the ingredients are gelling OK, which Dorion couldn't achieve once in like 7 seasons.