As we saw yesterday, he was used in the Dignitas vs JPak and friends match, and underperformed. In fact, this was the only professional match I saw him in. In theory, he has a terrific kit, with a 3 second hard CC, a health drain, a multi-target silence, and a high-damaging AoE ultimate. However, we never see him used in high level play, and he always seems to be countered far too easily.
So my question is this: what can be changed or improved to make him more viable?