You are incredibly misinformed. Not just about MCI, but about the draft in central.
If you can get a second pair defenseman with the #10 pick, it's not a bust, it's a slam dunk. Of the 10 players drafted at #10 before MCI, only one (!) became a top-6F/top-4D. Seven aren't in the NHL. this is true for #9 or #11 as well.
But fans only remember when someone succeeds, not the overwhelming majority that fails. Then they ask, "why did we not get Player X?"
The sitting staff isn't there to listen to Central Scouting. On average, they do a far superior job. Stepan also was an off the board pick. Even if the player doesn't turn out to be the best of anyone they could've chosen, it is no reason to whine.
And once more: getting a top-4 defenseman at #10 is a huge accomplished. To expect a start and whine otherwise only displays your lack of knowledge.