That's not unusual. For example, of the 10 cards Rex Raptor has voice lines for, his Gate decks uses half of them. (Two-Headed King Rex, Megazowler, Crawling Dragon #2, Uraby and Wasteland.) And he's one of the characters with the FEWEST voice lines.
this card seems decent if ur deck revolves around key monster cards like relinquished. it allows you to pick up said key card if it happens to be in the graveyard and allows you to manipulate graveyeard for special summon (eg. endrise, necrofear, etc)