I was curious about testing something out on him thanks to his really high Mana-Regen and while I was looking through his wiki I found that Overgrowth is able to increase his Max HP despite his passive.
Is there a plan to fix this or will you continue to allow it since it's such a relatively moderate boost in terms of stats?
Rocnation982 votesIs like 30hp really bothering you?
HarvestOfShrooms1 votesIt's not bothering me at all, especially since it can get much higher than 30.
I personally like the rune giving him some form of increased health outside of what he gets from levels.
No flash no life1 votesThey won't change anything, pyke's skill description specifies that Overgrowth increases his base hp and thus is not affected by the limitation of his passive. 
used to both increase his max hp and damage, but I believe that has been hotfixed and no longer does both effects.
Source: http://leagueoflegends.wikia.com/wiki/Pyke
Not too sure about his interaction to 
ult tho, I personally believe it'd increase his max hp but it'd be nice if someone can verify for us.