Vengevine just doesn't have the impact of the things you can do with a four mana card now in the cube
This vampire angel has somewhat of keyword soup of abilities, and its useful both as a lifegain commander and in support of one
While you cant attack your opponent with Treasures (Under most circumstances), you can use them to power out huge threats, or fuel artifact engines like Mirkwood Bats
In the battle between Absorb and other three-mana counters Absorb would almost always win out if it was easily castable, and it was even a small incentive to choose white over black as a secondary color
Anna - Mystical Majesty , meanwhile, can use Exceptional Power to exert all opposing characters, which works great with Olaf - Happy Passenge r, since that card's Clear the Path ability means paying 1 less Ink per every opponent's exerted characters