I don't see when use bytes; would possibly be useful to solve this issue.

Agreed. It’s not even clear to me what sort of problem it would solve.

I’ve never been fond of od output myself. And you shouldn’t need it, either. This tells the story clearly enough:

% perl -wle 'print ord do { use bytes; chr(1000) }'
232
% perl -wle 'print ord do { use bytes; chr(232)  }'
232
% perl -wle 'print ord do { no  bytes; chr(1000) }'
1000
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