Hey, @AutonomyGaps ! Nice to see you again.
In its current incarnation, the “Related” action uses a less sophisticated algorithm that doesn’t take tags or wiki links into account. So, yeah, large files are more likely to appear. 
I haven’t been able to work on this recently, but a very promising discussion is taking place here. I’m pretty confident that these gentlemen will provide the community with something a lot more powerful than my workflow.
This isn’t over yet 