I'll not judge Ornn....
But with the increase to his max health damage from brittle (7-12% to 12-20%) I expect a major wave of "too much damage while building full tank" complaints incoming. On top of that he can give 1k free gold to himself or team mates each level, starting at level 13 for a maximum of 6k gold advantage in items. Some might say this lacks skill expression and you increase your winrate by simply picking Ornn and not being afk.
Do NOT let the game get beyond 30 minutes if Ornn is around because he's going to have both his upgraded items and have his team upgraded as well.