I think if you moved Miller (and other cap-prohibitive veterans), and told Horvat you were committing to a core headlined by him, Pettersson and Hughes ... he'd probably re-sign. It won't be as cheap as it was previously, obviously.
I just think outside of a true tear-it-down rebuild (which I don't think is realistic here yet), your best bet is to jettison all these expensive veterans (Miller, Myers, Pearson, Garland) and use that space to re-build on the fly around Horvat, Pettersson, Hughes and Demko. In that scenario, you could probably also retain Kuzmenko.
Personally, I'd try to ditch Boeser and Mikheyev as well, but I dunno if that's realistic.
To what window? 3 years down the road maybe 5 because they have no depth or enough prospects.
That will just propagate the same issues only with aging stars again, not bad enough to get top picks and not good enough to win because there isn't enough on the team.
Pettersson is 24 years old tomorrow, he was drafted in 2017, 6 years ago and since then two first round picks have been traded so they are missing and the others haven't made that big a dent yet, even Podkilzin was drafted in 2019 4 years ago.
These FA's can see there is no opportunity for success in the playoffs.
Many FA's didn't want to sign in Edmonton until they got Dras and McD, ya the location doesn't help but the team record also hurt.
Vancouver is one of the most beautiful cities in the world, as long as you don't go down town to the 4 corner's drug legal area, they will even show you how to inject safely, even those that haven't done it before and you can go to one of the vendors down the street for your drug of choice openly being sold.
That said ya it stinks like skunk down there.
But the city apart from the expense is a desirable location for everything. But FA's that want to win don't want to go to a losing team or one that is "building" and still has a ways to go.
There were lots of teams in on Kuzmenko so he will not have any trouble picking his landing spot after showing he can be a force, probably even better on a better team.
Mik can be moved in two years but they might need to keep him.
Without a tear down where are the players coming from? The younger guys under cap control?
Unfortunately the team needs to bottom out AND trade for many many draft picks, get promising enough to sign a few really good FA's with cap space.
Most of the playoff teams window's usually have a few key players under cap control the first or second contracts