Explorer feels pretty balanced right now, with plenty of powerful decks offering their own unique strengths. However, one thing that’s become clear is that green is the color that’s improved the most in recent months.
Green Devotion is one of the best decks in Pioneer, but it can’t exist in the same form in Explorer, due to the absence of Nykthos, Shrine to Nyx from MTG Arena. However, with the recent Explorer Anthology bringing Elvish Mystic to the format, plus some nice new weapons from Dominaria United, the gap has closed a lot. Green decks, and Mono-Green in particular, have a whole lot to offer.