sejuani rework did the EXACT oposite of what they wanted to fix.
make her kit more impactful by making her ult less powerfull. her basic abilities are FAR LESS impactfull then her old one. just because you dumped EVERYTHING IN HER PASSIVE does not mean you fixed her "core problem" personally i thought her kit was FINE she needed some tuning to her early game clears to keep up with the meta jg THAT'S IT.
so revert that crap already instead of hotfixing and bring it back to the rework table.