On the goaltending front, I think you HAVE to send Blomqvist down now if you cannot or refuse to trade a veteran. It makes no sense for Murashov to be in the ECHL AND Blomqvist to be the backup at the NHL level. Both should be playing. Ideally, Blomqvist is sharing the load in the NHL right now and Murashov is playing at least half the time in the AHL. But we have the two veterans, so this is the next-best plan imo.
I never had an issue with the Jarry re-signing originally, and I have said as much. When it did not work out, however, you HAD to move on. But we did not. AND we doubled down on the madness by bringing back Ned. I like Ned, but Blomqvist should be at least playing in a 1A/1B situation right now. Sure, MOST goaltenders arrived a few years later than Blomqvist's current age, but he does feel like the exception to the rule. Anyway, this one isn't even a Sullivan thing because it seems the coach could care less about which goaltender is in the net, he just goes with the guy who won the last game, basically. Dubas, trade Jarry or Ned please. Find a deal that does not wreak and move on.
About the coaching systems thing, perhaps the most frustrating thing about Sullivan's system is the whole "north-south game" thing. This is probably why he hated Kessel, and probably why so many of our European players struggle. Sullivan seems to tolerate Malkin but only Malkin. I truly believe this is at the root of Karlsson's struggles (I focus more on his point production because he has always been a net positive, despite mediocre defense). A good coach maximizes output from his players, ESPECIALLY his best players. But if you do not allow for players to play their game, many of whom are more east-west types, then you get what we currently have now. How many times do you see our guys on an odd-man rush, or at least the start of an odd-man rush, only to have the player dump the puck in?
Sullivan wants robots, not hockey players.