What's Struve's biggest win to date? Miocic. What is the one fight where he's been accused of poking someone's eye? Miocic.
Other than that, I can't remember him eye poking anyone or throwing oblique kicks, or elbows to the throat or back of the head, things like that.
But to dismiss it as "oh if it was reach, Struve would be champ" is an incredibly shortsighted and spurious argument.