S Class Mercer will be the next promo character and the first obvious stand out is that he stuns 5 with his leader skill for 1 turn. This is the first complete control on a leader skill to come into the game and could lead on the different types and enhanced versions - taunt, confuse, impair, 2 turns, 3 turns etc.
However he also is countering quite a niche part of the game and that is bleed teams with his active skill with the majority of people who use these teams being high spenders. It can be dazed however the reliance on Priya is becoming too high and the need to bring more daze weapons into the game to provide attack team diversity is required.
Complete Control Leader Skills, Do you want them? (Stun, Taunt etc.)