In Commander right now, the quantity of mana needed to do the thing keeps ending up being less and less, and so games feel quicker and quicker
Having lifelink is huge to start, so it actually has a built-in way to gain life
Activate only during the declare blockers step
Considering the myriad options you have for returning cards from your graveyard to play, you should treat this Golgari sorcery as just plain better than Shared Summons, even if creatures in your graveyard are a little more vulnerable than the ones in your hand
This also ensures that players will have the resources available to activate Belle & Beast Certain as the Sun's Appreciative Audience ability, which lets players ready all of their other characters for a mere six Ink, though they won't be able to Quest for the rest of the turn
As a sidenote, we won't be releasing Jumpstart Boosters alongside Wilds of Eldraine