I use Oddessy Twisted PC plastic pedals. They are pretty grippy for plastic pedals and have a nice wide platform. Light weight! They told me at the shop they don’t fit their half toe clips though.
It all adds up, especially rotational mass. Remember the story of the straw that broke the camels back? It’s worth shaving a few straws off on your pedals if they perform how you like it I reckon.
I wouldn’t mind trying some of those special bike shoe-pedals that clip in- it would be interesting to see if you could freemount straight to clip-in on a Coker after you are already fatigued.