Studio one can do infinite already.[all daws can with snap off]
What would be nice tho is the option to quantize by hz.
Like a menu item. fl studio's chop tool is just a smaller rpg-8 and notefx arp.
Giving that particular notefx a bypass button and upping the rnage toeither your suggested 128 or 1/256 would make that arppegiator jesus.
Or increasing the quantize threshold to 128/256 since there's also a split to grid feature.