Top decks from previous set were Golgari, Boros aggro, Selesnya tokens, Jeskai control, Drakes, monored, and monoblue.
- In current meta Golgari appears to have become Sultai to incorporate Hydroid Krasis, which is very strong.
- Boros is still around, although some have gone Azorius instead for Deputy of Detention and Dovin Baan.
- Selesnya tokens appears to have fallen off a cliff. I don't blame the deck, since even though I played it a lot last set, it didn't really gain much and the control decks (which were bad matchups) gained a ton.
- Jeskai control seems to have been phased out by Esper control, although that might be a temporary thing since Jeskai does have strong cards (Crackling Drake, Niv Mizzet and Deafening Clarion are all very powerful)
- Monored surged in power having picked up Skewer the Critics and Light up the Stage. It can still be hated out though, especially with other decks getting incidental lifegain cards (Hydroid Krasis for example, and Basilica Bell Haunt)
- Monoblue is still around but it's hard for me to see it as viable, given it was already mediocre last set. It only gained the UU counterspell.
Other thoughts:
- Rakdos aggro appears to have disappeared. I wonder why. Spawn of Mayhem is a great card, so are Theater of Horrors & Judith.
- Bant Nexus also got a lot better from Wilderness Reclamation and Growth Spiral, but is vulnerable to sideboard cards. It didn't do well at all at the previous open, but is a lot stronger in BO1.
- Various new decks should also be possible. I wonder for example if an Abzan midrange deck can exist, and don't see why not.
I'll be pretty busy the next two weeks, so I won't commit to a deck yet, but I'll be following the metagame with interest