After the battle with the Death Knight, Leon basically confirmed that Tear Claw and Dragon's Jaw weren't very useful. There weren't many opportunities to wield a sword where they could come in handy, but hey, it's better than nothing.
Of course, being strong is a momentary thing, but being stylish lasts a lifetime. While power is undoubtedly important, having good looks shouldn't be underestimated. Although Tear Claw and Dragon's Jaw didn't live up to Leon's expectations in terms of strength, as long as they looked cool, that was enough for him. He eagerly awaited the upcoming Dragon Armor.
As for being intimidating, it had no effect whatsoever on the Death Knight. Leon understood this and wouldn't underestimate it.