Sejuani passive

Im not sure who else has had the terror of experiencing the new sejuani adc bot lane, i just finished a game and before i had my first tiem as a jinx sejuani had 300 armor by the time we surrendered she had 544 armor with ninja tabi and iceborn, her botlane with braum is a menace while she cant kill you very much as long as you stay away its impossible to kill her they just have to wait for ganks which they got quite a bit with 4+ people and on top of that with just her braum and warwick they could towerdive at level 10+ rito plz fix