@Riot, do you think you went to far with Sejuani nerfs?
At the moment Sejuani is a champ who seems to be struggling. She has both a low win rate and pick rate and has not been a competitive pick for months.
When her items were all nerfed recently she wasn't given compensation for it unlike many other tanks. The combination of direct nerfs and indirect nerfs seems to have put Sej in quite a sad place.