The fact that Conqueror can also swing for five in the air makes it much more competitive in current Magic, too, even if it is more vulnerable to removal
Where one player sees Beseech as copies 5-8 of Sheoldred, the Apocalypse in Standard, another cEDH player sees it as a toolbox tutor to find whatever answer or win condition the game needs
Archangel of Thune puts a +1/+1 counter on each creature you control whenever you gain life, which means infinite life and infinite counters on creatures you have on the battlefield
This opens up a ton of new options for existing Commander decks built around the mechanic, and will likely create a few new decks, too
So a Prodigal Sorcerer can deal 1 damage to kill the Rootwall before that ability resolves, but after the cost for the ability has been paid
So, you can play Umara Skyfalls as your extra land for Dryad of the Ilysian Grove, or off the top with Bolass Citadel but not off the top with Radha, Heart of Keld