Some types of pedal pins have a poor grip to manuverability ratio. IMO set screws are the worst, small diameter screws are a bit better, fat screws like those on metal JC’s are the best I’ve tried.
Also a pedal w/ more but shorter pins is better than fewer but longer screws.
I need VERY grippy pedals. I replaced all the allen screws on my JC’s w/ the longest ones my hardware store carries (12 mm) for my Muni. I’m looking forward to getting some new low profile pedals w/ a lot more screws (like 10+), so I can use shorter ones. Check out the pedal thread.