We've been over this before... every rebuilding team in modern NHL history (literally every example of a "good" or "successful" rebuild you could conjure up in a previous discussion) has made depth signings like Marc Staal for leadership.
Every successful rebuild in modern NHL History had young players/prospects needing to earn their ice time, not just being thrown on the ice for the big club cause "hey we're gonna suck anyway, let's see what we've got".
You talk about how bad our talent development is as if we've just let monster player after monster player wither away in the AHL under our terrible coaches/execs and then they've gone elsewhere and been successful. Can you even name one? Good players careers don't just wither and die because a team didn't handle them perfectly. They might take longer to breakout or need a change of scenery to do so, but I'm really racking my brain for a single example. If anything, I'd say we capitalized on another org's failure in talent development w/ Tippett. If Provy goes on to play great for Columbus, that would be the first one and maybe you could start to build your case, but consider me a skeptic on that happening.
The thing that has really plagued this organization over the years is terrible long term signings, poor drafting, poor trades (using draft capital for marginal or bad players) and (to a lesser degree) bad luck with injuries. The current regime hasn't made any bad long term signings, hasn't spent any draft capital in trades but has rather stockpiled it, and by all accounts they hit a home run in the draft.
But hey, stay negative!