The Flyers do seem to enjoy drafting those types of players.
This was the write-up on Patrick from THW in 2017 -
While Patrick is the consensus best player in the 2017 Draft class, he’s not considered a potential elite player the way similarly-situated players were in previous draft classes. The reason? He’s not bad at anything, but it’s argued that he doesn’t have a single aspect of his game that’s especially dynamic or dominant. He’s really good, but he’s not tearing apart the league mercilessly the way Auston Matthews did the Swiss League or Nathan MacKinnon ripped apart the Quebec League.
This is the write-up on Oliver Bonk -
Whoever drafts Bonk is likely securing a safe bet for a future top-four defenseman. He doesn’t have any glaring holes in his game, and while there are no stand-out skills that stick out above the rest, he is one of the safest defensive prospects to draft in the back half of the first round.
And the one for Luchanko -
Luchanko took key defensive zone face-offs on his strong side. His combination of speed, skill, compete and smarts project him as a top six NHL forward. Luchanko isn't elite in any one category, but he's an excellent all-round prospect who contributes better than secondary offence without sacrificing three zone detail.
I guess the Flyers have a type. And it's vanilla.