User blog comment:BIA-Kaboose/The Problem Behind Balance/@comment-24212970-20131211103144/@comment-4846081-20131211220500

Rumble's problem is his lack of heavy slows, and the fact he doesn't have any stuns or snares. Get a good gank? Tons of ult damage. Ni ganks or snares? Move left or right, crisis averted by the enemy.