Actually, if you look at Raviance's posts on a few of the Sejuani threads, I think you'll find that he supports (almost promotes) a few small changes to Sej, including a removal of the stop on Q and some early game enhancements. I could be wrong, but I'm pretty sure he wants small changes and speaks out against a large buff.
37/37, this is pretty much the stats you'll find as a whole in the Ranking community, maybe Rav is the only one that plays ranked with her and that's all we see O.o
Its not only that the changes need to be nuances as rickless describes them but they imo should further distance herself from the shield/sustain group and focus on mobility for survival.
I have recorded the details of my Sejuani games pretty good and with time 37/37 will be a memory. I climbed from 2-7 in placement matches to even the score even though I have 2 losses from leavers vs. 1 win... and 2 losses from a mid elo booster that wrecked my teams mid and snowballed out of control. So overall I am very confident I will continue to climb.
See imo her early game weakness is a myth. She can't dual so well true but all the rest is sensationalized. It is her inability to change the course of a game even by competent players and that's why she isn't picked at high elo.
She needs zero sustain, what she needs imo is a better way to slow and disrupt the enemy team with the skills she has. Removing the stop on her Q does this and it increases her damage capability without stat boosting, increases her threat without stat boosting, increases her play option without stat boosting. Increases Sejuaniz value without stat boosting. Without adding or changing her kit or play style.