I don't know why you're singling out Jost, he's been at least bringing energy and effort to the team. He's not a #2C, but i'm perfectly comfortable with him as our #3C for now. I'd look at moving a few of Burakovsky, Donskoi, Compher, and Graves before even looking at upgrading our #3C spot. Not to mention, Jost has shown improvement in every single year. We also can't afford to spend $4-5
I'm willing to give G more time, simply because his skillset fits the Avs perfectly. With that being said, both Girard and Makar need to figure out their shit in the postseason, because they're nowhere near as dominant. The last thing we need to do is anything rash, and IMO moving Girard in a less than ideal scenario is how you destroy a good thing. We still have Byram coming along, and if he can hit his potential and be that rock on the backend, we'll be able to still use Girard to match-up against lesser lines and not rely on him so heavily.
I'd give our core another 1-2 years, depending on how far we make it next postseason. If they still can't make it to the Cup finals, then you start entertaining offers for Girard as a shake-up.