Wich Champ need a rework?
I think Azir and Kalista needs a rework because nobody plays them and if they get buffed they destroy everything. So what do you mean?
I think Azir and Kalista needs a rework because nobody plays them and if they get buffed they destroy everything. So what do you mean?
URGOT!!!!!! no one is in need of a rework more than he is

these are more in need of a rework than
and 
Yasuo. His kit is too toxic. This is an official rework quoted from @RiotMiddler which will come live in the next patch.
'We're turning Yasuo into a ranged marksman who throws swords at people. Passive: Every third hit knocks the enemy up. He has to reload every 4 attacks. Q: Yasuo throws a sword which deals damage to first enemy hit and slows. W: Yasuo shields himself. E: Yasuo dashes at target direction. R: Yasuo damages and knocks up nearby enemies.'
i think Irelia don't need a rework maybe a little buff....