is it possible to change Overgrowth?

#FROM THIS#

PASSIVE: Every 8 monsters or enemy minions that die near you permanently grants ( 3 ) bonus health.

#TO THIS

PASSIVE: Every 8 monsters or enemy minions that die near you permanently grants ( 4 ) bonus health.

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Now after getting 15 time the passive it gives you 3,5% maximum health

After gaining 15 stacks (120 monsters or minions), you gain an additional 3.5% maximum health.

is it possible to get the 3,5 % maximum health AS BONUS HEALTH instead of Maximum health?

the reason behind it? it is more useful