Sejuani is still too strong
At level 9 Sejuani does 12% max hp+450-500 over 4 seconds on a single skill . So maximum of 650 to 850 without any AP on a tank ? Considering how powerful she is late game with abyssal you should make her mid game weaker . Its pretty funny when Tank bursts Ad carries for 80% of their hp .
I won't even go into situations when she can hit multiple targets which is common . With her Ulti,Slow and new jungle items it easily goes up to 1500 per 4 seconds without any offensive items . Why Level Q or E beyond level 1 if all damage is on W now . That is why her mid game has so much burst .
Also since Q damage is no longer significant you can easily save it for escapes unless you really need knock up . Before it had risk because you had to commit Q for damage .
Until you separate Max HP damage from W she will be priority tank pick .
can take out 80% of an adc hp quit QQing with full tank items