Support Galio/ADC kalista

How has no one on the professional scene realized the potential of this? I saw support galio played i think in season 3 EU LCS in like one game, and that was before the major buff to galio(tenacity no longer effects duration of ult).

Kalistas ult completely solves his gapcloser problem, and two seconds of basically everyone on their team fighting the support seems like a complete game winner.