Steve Staios already said that they're building the team around Tkachuk, and I have to be honest, some of the takes in here about him are super weird considering he's consistently one of the best 5v5 players and scorers in the league. He's a near lock for giving you 35-35 each year and generates a ton within the slot. He's quite literally the exact type of player that would help fix a lot of issues, and he has the bad rep right now because he's one of those players that's easily hatable when he's not on your own team.
Anyways, I'm not gonna waste too much time on a post mortem while last night's loss still stings, but there's a few things systemically that are pretty apparent as to why they keep losing these types of games over and over again.
You're not going to win when you have a forward or two cheating high trying to stretch the neutral zone and the other team pushing their dmen to the tops of the circles. Tampa closed us out this way, and it's what Florida did for 3 straight games. You leave your defense in a brutal spot where there's no puck support and they're forced to chip it up the walls and hope for you to win a NZ puck battle. Even if you win that battle, your forward is likely just going to be going 1v3 or 1v4 into the offensive zone, dump the puck, and go for a change. It's giving your opponent to start attacking you with momentum and speed while your guys are trying to get set up coming off a line change. You need puck support to ease the pressure against high forechecking teams and to attack through the NZ with speed. Even if a team is trying to trap, the controlled zone exits let you chip-and-chase with numbers to have better odds of winning puck battles down low and generating zone time. Part of it is personnel, but it's been a common theme under the last 4 coaches that just simply hasn't been addressed.