The Gates and Izzet Drakes decks both fall to not having enough pressure early on, as well as being weak to the phenomenal removal that Esper Control has
(Hydroid Krasis, Im looking at you.) But dont let that colour your opinion of this Familiar
To me, however, I think Glaceon will hold up better overtime
Thoughtcast Thoughtcast sees play in many formats, from Legacy to Pauper, as an efficient draw-two spell for 1 or 2 mana
That islandwalk helps, as well, as someone at the EDH table is running blue
Other than that, it was more or less the same dominance as in Standard: Boros energy and its three color variants immediately shot to the top rank for both usage and winrate, the various build-around energy cards all proved to be at least viable, and even control decks adopted the new energy-based interaction