I'd say PnP fidelity is a moot point considering how far turbine has diverged from PnP. I'd also disagree that bastard swords aren't still useless to the vast majority of characters given said suggestion. If you want to add more versatility to weapon choice I say add this property to all non-finesse one-handed weapons, like PnP.
This will not make the weapons "better", just get them used more often (is that your goal?).