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
Energy SVE 10 4 Prism Energy BLK 86 Total Cards: 60 Mega Latias can be built as a poison toolbox deck, granting additional damage output via special conditions, while also combining with a plethora of additional attackers to maximize effectiveness
When you mix in cards like Vilis, Broker Of Blood, you get an additional value engine to constantly draw cards as well
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
Deck builders tried Solitude in nearly every deck that could support it, and it eventually found homes Azorius Control, Four-Color Blink, and Elementals