They are about to enter cap hell, there are no pieces coming -- what you see is what you get, minus a late first round pick. Secondly "young" is a relative term. Damian is 28 and will be 29 next season. That's not young for a small guard, he's got maybe two? Three? more years of being able to play at his current level, after that it may be a slow decline, or a rapid decline, but it will definitely be a decline and then they are really fucked. Beyond that we just saw an object lesson about why our two best players really shouldn't be starting together in the backcourt. They're definitely good enough to rack up wins during the regular season when half of the teams you play aren't very good, but come playoff-time, they haven't held up against teams that have all of their energy and focus on game-planning a single opponent, and they got murdered on the defensive end because Holiday was too big to handle, and the only defensive-minded guy who might have been able to handle him (Aminu) was busy trying to bail water against Anthony Davis.
Here's the truth: Anthony Davis is younger and he ain't going anywhere. The Blazers couldn't do shit to the Rockets, they ain't going anywhere for the next couple of years either. The Dubs were beat up all year with injuries and seemed like they were going through the motions, you can't count on that in future seasons. So let's say you can get past any of those other teams and actually get to the finals, what then? Well for the foreseeable future it's guys like Simmons, Embid, Giannis, LeBron, Taytum, etc. standing in your way, almost all of whom are much younger than the Blazers tandem of star guards.
This team is too unsuccessful to reasonably afford going into repeater tax hell, yet they are loaded down with some of the most undesirable contracts in the NBA, which makes conducting trades for the things you want or need nearly impossible, without putting guys like CJ or Damian on the block. This team will not get better if all they are offering other team's is Turner, MeyLe, Harkless, et al.
As for firing Terry? Replacing Stotts isn't going to fix the glaring roster issues, but nobody can convince me he was getting the very best out of this team either in playoff situations. Poor use of timeouts, and little to no adjustments in-game or between games. A new voice won't get this team to championship contention, but it probably won't hurt.