I don't see it would work with something like
import_request_variables() unless thats removed or extract(), which is
some of the reasons for this replacement feature afair.
There was never a need for the replacement to occur for the GPC superglobals.
If import_request_variables() needs it, it can do it there only for that import. I.e.
$_GET['foo.bar'] is just fine, and importing 'foo.bar' with the above function could still produce $foo_bar only for that specific edge case.
It's just a premature replacement too early the stack.
Regards, Stan Vassilev.