Ever wonder why is sejuani not played
Her cooldowns are too high. She only has q to close distance and she must suicide pretty much for going in, cd on her q should be 3-4 seconds lower on all ranks. Also her "new" w active is worse than the old one, and it should last longer.
Lee Sin has two close distance/escape abiltys on low cd, that is why he owns oll other jungler in game for last 3 years.