Aatrox ult VS Olaf
Lets see so Aatrox gets does 200, 300 and 400 AOE magic damage and gains 175 range and gains 40 50 and 60% attack speed lasting for 12 seconds.
Olaf gets a passive defense bonus from his ult. When he Ults he gets 40 60 and 80 bonus AD 50 60 and 70% bonus movement speed. Additionally he is cleansed from all crowd control and can not be crowd controlled for 6 seconds.
Honestly, this a joke. Aatrox's ult is basically bonus attack speed--the ult might hit 1 or 2 champs, and its really not even much damage or you might have to ult from the backline and use his increase range to start beating down champions....but many other champs can have bonus attack speed in a burst by building Ghostblade which is not something Aatrox typically builds.
Olaf gets SO much from his ult. The bonus AD, the movement speed to chase down champions while being immune to CC AND he gets a passive from his ult as well!
Seriously, Riot, wake up. Aatrox's ult is a joke compared the ults of many other champions.