Out of curiosity, what does Contextual::Return provide to you that "normal" Perl code does not? Do you reallly make so much use of overloaded stringification that using overload is too much hassle?
wantarray and caller have worked for almost everything I've ever needed, and I need them rarely, at that. In the current case, I was partly exploring C::R's capabilities, to enforce stricter usage of some subs--beyond the typical croak on void context.
Truthfully, even if it would have worked flawlessly, I likely would have ended up removing the module dependency once the bulk of development was done and I had unit tests that took over.