I'm not sure you've looked objectively at the Avs roster recently...
Depth is something they've absolutely addressed and while they don't matchup toe to toe with our depth, Colorado is no longer playing multiple players up a line or pairing... There's room for a top 6 upgrade with an elite player, but that's about it. Their defense could arguably use a better #2/#3 guy to push guys down a slot, but didn't suffer overly for missing EJ (who fills that 2/3 slot) for 13 games.
I think Colorado's D doesn't get enough recognition for its ability to play a transition game. They are absolutely going to surprise come playoffs. They were on the wrong side of a blown offside call from going to a game 7 OT and possibly advancing to the WCF last year - they've improved at every position since.
They've added grit bringing in Bellemare and Kadri, adding to some of the most physical players in their respective positions with Zadorov and Landeskog...
Experience is something that we won without last year - defeating 2 of the most successful post season teams in the league in Boston and San Jose (seriously, look at their post season records). Previously, we had 1 guy who had played in a SCF and a handful that had been in the WCF - lining up against Boston and their wealth of experience - it's not as big a factor as it gets made out to be... Ask Washington. Or Vegas for the flip side of the coin - their experience facing adversity didn't allow them to overcome one of the worst calls I've seen in the playoffs this decade.
But sure, Colorado looks lacking in experience and coaching. Absolutely there's room for improvement - again, not overly different from us in the past.