I tend to only reply to Abigail-II when I disagree; this isn't one of those cases. Using whitespace to control grouping is dumb, dumb, dumb; that's what parens are for. This is going to be an endless source of bugs for newbies (in addition to offputting non-newbies such as Abigail).
I'd welcome hearing rebuttals the other side (but not enough to venture into the perl6 lists to hear it).