I would really like to see % removed as a binary selector and available to use in unary or keyword ones. The only implementor in a Pharo 6 image is:
��% aNumber
����
������ ^ self \\ aNumber
So it's juts aliasing \\ , and % most widespread usage in the real world is por percentages (the use in modular arithmetic is more a programming thing that math notation I think).
And for allowing more Unicode code points for selector names I'm totally in for Symbols, Arrows, Math Symbols, etc... We just need to analyse the ones that makes sense as binary selectors, and the ones allowed for unary and keyword ones. This will allow us to write pretty cool DSLs.
Just my opinion.