Idea about Kogs ultimate that works for everyone hopefully

Idea is simple:

1. The farther Kog'Maw uses his ultimate, the lesser the damage is. No more crap with damage based on % of enemy HP (capped at something like hmm.. 33-40% at longest range). Simply: Wanna snipe? Sure, but you sure as hell won't "oneshot" ppl (exaggeration).
2. AOE relies on range. For example from 0% to 60% AOE of his ultimate is normal. But once it moves past 60%, AOE gets smaller. At 95% AOE is as small as Ezreals pe I mean as Riven mains brain Ugh.. II IS JUST SMALL. VERY. SMALL. That way good Kogs will be amazing, while bad ones will have to take a risk and come closer.
3. Keep, but decrease slightly, mana gate for firing shot after shot.
4. Ap ratio should be "decent". You could add just lil bit of AD ratio (like 0,1 for shits and giggles), and final damage depends only on range.

Done. That's how I see "better" Kog'Maws ultimate. Healthier than before. Less stupid as now.