If it were released as a module, it would be very nice.
Well, writing a PCRE module with a procedural or object-oriented interface would be reasonably easy, if that's what you mean. Getting slightly more ambitious, if perl's regex engine were made properly pluggable, you could write a pragma to switch in the PCRE implementation.
use PCRE;
print "Well formed!\n" if /$Juerds_regex/;
Out of interest,
why wouldn't you like it replacing Perl's built-in engine? (supposing the UTF8 support were properly finished)