What have Riot learned from the Ryze & Cass rework?

Old Passive:
- Mana to AP
- After casting 5 spells in a row, he will gain a shield & bonus movement speed for a short period of time. During the duration, each spell he cast will refresh the cooldown of his other basic abilities.
New Passive:
- Mana to AP & vice-versa.

Old Passive:
- Gains stack of Aspect of the Serpent for poisoning enemies.
- At 100 stacks, bonus 5% AP & E heals.
- At 250 stacks, 15% AP & 25% CDR
- At 500 stacks, 30% AP
New Passive:
- Bonus movement speed......that's it.
So what's the motto we've learned today? That's right, it is to:
#KEEP. IT. SIMPLE.
God I hope the new Yorick wouldn't be as complex as them or Aurelion Sol......