Although it is no where near the level of finisher as a Baneslayer it is much more reliable value and immediate tempo, the latter of which is especially important against the decks you are playing life gain against
Ideally, you need to start hitting with Psychic Sphere and collect as much Energy as possible for late-game as Psydrive discards 2 Energy on usage
Deck builders tried Solitude in nearly every deck that could support it, and it eventually found homes Azorius Control, Four-Color Blink, and Elementals
When you mix in cards like Vilis, Broker Of Blood, you get an additional value engine to constantly draw cards as well
This card was sold as ungraded for $200 which just goes to show how valuable it is
The fact Wizards were willing to let the mechanic ride again makes me hopeful they feel the same, and that this time the energy decks will be just one more cool flavor in a balanced and diverse Standard environment