Perl 6 vs Perl 5

Can we have a serious Perl 6 vs Perl 5 thread?

I've been trying to wrap my head around what roles are trying to emulate. Just an odd sort of OO way of programming?'

What else where significant changes?

I don't get why Perl 6 changed the C-like (and Perl-like) syntax for no apparent reason, like the ternary operator (?? !! instead of ? :) and the change from for to loop. What was the point of that?