You have to look at Entomb for what it is and not necessarily what it wants to do. There are intangibles that keep the deck glued together and the synergy these cards bring to the overall consistency of the deck.

Imp not only feeds Ichorid, but it allows you to timely drop the highest-dredging creature into your graveyard repeatedly, gives you a blocker, attacks, and feeds Therapy and Dread Return. These are all *incredibly* important traits that a deck like Dredge not only wants but needs as well.

Entomb offers nothing new in a deck that consistently is able to put its cards into the graveyard at an accelerated rate. Entomb has novelty, and that's really about it.

Entomb is what it is, but I fail to see its superiority over already proven staples of a long-running archetype.