I never dried my clips, just a quick rinse was all I found necessary. I also found it easy enough to agitate - I just slid the clips back and forth along the top of the slot. The reason I stopped using mine was that I felt it was wastefull because I needed to mix up a lot of chemicals to fill the slots, and frequently I didn't use them up. I still pull them out if I want to print 11x14's as my tray space is limited.
So why do they not use a carrier rack in the slot?
You know, an assembly that is very perforated with cut grooves on each side that the paper would slide in (like a 4x5 combi-tank). With multiple paper grooves an 1/8" apart you could get maybe 6 prints in a carrier designed for a one inch slot.
An auto-agitator would be relatively simple to construct for something like that.
Just like makin' french fries. ;)