I don't really see a need to buff it's blocking ability since it isn't used by anyone at all.
It's like saying the saber/sabre should be buffed in its reflect ability from 90 to 99% and still, nobody would use it.
As for an inexperienced player who bought their first EC item, and they're already disappointed. Sabre is fine, but is an utter waste as Katana beats it easily.