Guess adding this would mean I have to again edit a script so it uses a different format since I'm using it as $chr(NNNN) for the unicode character.
No, it wouldn't break existing scripts. I believe this was the idea:
$chr(NNNN) --> treat NNNN as base 10 value
$chr(0xNNNN) --> treat NNNN as base 16 value
$chr(U+NNNN) --> treat NNNN as base 16 value
