I don't know about these Mundo changes...
For those who haven't seen them:
- Burning Agony (W)
- Cost lowered from 10 health per second to none.
- [New effect] Now deals 15/20/25/30/35 (+10% AP) magic to himself every second.
- Masochism (E)
- [New Effect] Passive: When Dr. Mundo suffers magic damage, his magic resist is increased by 2% for 2 seconds, up to a maximum of 6/12/18/24/30%
It's obvious what they're going for - buffing Mundo's MR - but it's not like there's a real divide between physical and magic matchups for him, so bonus MR is a strange choice.