I don't mind annoying people to solve problems.
Branding is not the problem with Perl 6, though it is the easiest thing to bikeshed. The problem is compiler speed, language interoperability, and enough of a toolchain to start building serious apps. Make that good enough, and no one will care what our language is called.
Have a frontend that can invoke the perl5 interpreter as well as Rakudo as appropriate, supporting the perl5 command line flags, and arguably quite a bit of the problem goes away.