While this can be an issue, since Reanimator decks really want all their creatures in the graveyard, there are ways to work around it
For example, Titania, the most valuable Vanguard card, grants its owner the ability to play an additional land each turn
Her lack of combat buffs is not relevant for this archetype's game plan and so having those things replaced with broad utility, greater immediacy, and rate on token production is a big win
Ive seen Umezawa's Jitte win Legacy games for players that should not have won, and I have no doubt it would drastically shape the Modern format should it be unbanned
Whilst the other Magic Backgrounds arent one-for-one, theyre still represented: Urchin is Street Urchin, Entertainer is Popular Entertainer, etc