I cannot remember any discussion to replace the C-style comma in the 7 years that I've read p5p. I don't think such a proposal would make any chance, for several reasons: there is already a synonym for the comma: =>; it doesn't save anything, instead of a single keystroke, you'd have to use at least 4, but often 5. And it has the potential to break existing code.

The comma is a well-known construct - especially amongst the people on p5p, as they tend to know C quite well.

Abigail