User blog comment:Emptylord/Custom Champion - Jeddica the Ice Breaker/@comment-7709681-20140826154203/@comment-7481207-20140826174312

Either make the crowd control weak enough to not be overpowering, or make it conditional (like Xbalanque's ultimate in smite that only stuns moving enemies at the end of the countdown). Combining both could also work, for example a global slow that is stronger on enemies closer to you.