I feel like Kog'maw needs some snacks instead of spitting everything out.

The background of Kog'maw states that he or she is voracious, but my little Kog would only get even starving and thirsty after spitting out body liquid and other material. So, it comes to how the game-style fits his lore. I am thinking about a tweak in his passive that adding something like how Zac picks up his blob. Or something triggers after his death. I realized that most marksman lacks build-in sustain in their kits. Here are my suggestions.

A) Inspired by Zac, GP, and Zergs, whenever a minion, monster or champion dies after at least hit by one of Kog's auto or abilities during a short period drops an "essence"(like how Zergs collecting essence). Whenever Kog picks an Essence, he restore something or stack them for an upgrade(like gp's silver coin) . 1) Upgrade that enhances Utility, such as increasing movement speed on his OOZE. Killed units drops small Area of OOZE on their feet.(Like they melted after Kog's attacks) 2) Upgrade that enhances Sustain, if the essence doesn't restore anything, now this update renders essences the function of restoring hp or mana for Kog. The alternative can be that Kog's consecutive attacks against same target grant Kog's additional life steal/spell vamp/fixed heal/percent healing. (Like I melt your skin with my fluid so I can taste more of u, kinda gross but cool) 3) Upgrade that enhances Damage, oh-hit apply on q and ult? Or changes W to be a triggered skill like Jinx's Q? Or other skills and auto sharing the resistance reduction from Q?

B) Inspired by a recent idea I read about Zyra's passive on Sur@20, Kog'maw's passive revives him if at least one champion dies directly or shortly after being hit by his explosion, otherwise fails. The reviving has a cooldown like Anvia's . But u can choose whether u want to revive in a short time frame, and if u refuse, the revive won't go to CD. About kills count, there are two suggestions, one is that If u revives and got killed again it still counts as a kill. Or it won't count as a kill until u refuse to revive . If the revive is on CD, then it counts as a kill immediately like now.

C)Inspired by Kha'zix. Kog, while collecting enough stacks of essence, change his form. Kog is always like either a little puppy or a caterpillar. So what happens if he grows up and morth into something stronger? And what path can he take? 1) Collecting essence dropped from minions or monsters stacks Hunter's DNA Points that morph him into someone who becomes more deadly to minions and monster or deal more AOE damage.
2) Collecting essence dropped from champions stacks Killer's DNA Points that morph him into someone more deadly to champions or change him into an assassin. Either path stacks on their own but you can only choose one and it will be permanent.

So, how about my weird ideas, I just feel like feeding Kog with snacks(PORO Kog'maw?), he needs to intake something at least.