You keep bringing up Benson who had significant issues with footspeed from the get go. This season they've added Ryan McLeod and Evan Bouchard as full time options who've taken on fairly significant roles. They've also seen a significant step forward from Markus Niemelainen, who at one point was completely written off as a prospect.They're hard to get a read on because the GM sucks and didn't do his job in the summer leaving a glaring need in net. Even he admits the blame should be on him.
I would also pump my breaks on the Oilers having multiple Oilers coming from Bakerfield being better than even Perlini.
Everything suggests Benson would be but he's really not and this is a player with years of development.
The D is shaky with several inexperienced D and the goaltending is unreliable and mentally the team checks out when they don't get big saves. Those are bigger issues than Derek Ryan.
You're isolating a single position blaming it for the poor performance of an entire hockey team. It just completely misses the point. The Oilers haven't competed against teams that have greater depth than them, run tighter defensive systems or quite simply shutdown their two offensive catalysts. That isn't a goalie issue. That's a depth issue and it's a coaching and execution issue.