The chain of events, if we take Kasper at 7 (I like Savoie more than Kasper and I've been talking about this all year), then Yzerman can take Savoie at 8. At 9 maybe we take Lekkerimäki.
For me Savoie + Ostlund > Kasper + Lekkerimaki
Or they still could have taken Savoie at #7 and either got an even higher player on their list at #9, or traded back a few spots to pick up another couple of picks (2nd + 3rd/4th) and still taken Ostlund.
If we mean what we say when we say "trust our scouts", then we can trust the fact they obviously thought this was a move worth making and played out the scenarios in much better detail than you or me or other people on these message boards.