Its disproportionately strong against combo and control while not exactly breaking any records against aggro or midrange decks, particularly ones with Thoughtseize, Inquisition of Kozilek, or Abrupt Decay
This means its a very tricky matchup for Grixis Control, despite all of the decks cheap interaction
Its a huge universe, and this is just the beginning.
Ill leave these 2 support articles here for clarity
General Leo Cristophe* If Leo cost a bit less mana hed be much higher up on this list, as at 5 mana returning one cheap creature, and growing based on how many creatures you have is just not that good especially given he lacks any protection or evasion
However, it appears that the news slipped out before things start off