An unpowered shards cube (no enemy colors here) with heavy mechanical inspiration from Amonkhet.
Sands of Alara is aimed at creating a competitive draft experience with overlapping strategies and interesting (but not confusing) choices, even with 5 or 6 drafters.
Card Pool: Not restricted to any time period, rarity, or set category, but selected with a bias against unnecessary complexity, minimizing flip cards and different tokens.
Singleton, except for the two-color "ping" deserts from Outlaws of Thunder Junction, which are two-ofs.