In my limited testing, you felt invincible untapping on turn three with a clock in play and a Queller in hand, and this might have been rated higher if I had more reps on the different Queller decks being thrown around online (Delver variants, Spirits variants, Bant variants, etc.)
It is likely that over time we will get better and better alternatives to Woolly Thoctar, but for now this card is very good at its job
It also features Pudge, which is worth the hefty price tag alone
Her ultimate ability is fun, hard to reach, and not overpowered or so insane that people must kill her before she reaches that stage
All this talk about the coming Tarkir set got me thinking about our first visit to Tarkir in 2014s Khans of Tarkir
Bladecoil Serpent and Cityscape Leveler will have the most impact on control decks in Standard, but I do like the design of Steel Seraph