Punish Cho'Gath (slightly) on deaths

Old Cho'Gath, for those that don't remember, could only get 6 stacks on his ultimate and would lose half of the stacks upon death. I like how the ultimate doesn't have a max amount of stacks these days, but it does get a bit silly with no risks.

Early game I think it's fine, you choose between the safe stacks from minions or keeping the kill pressure alive. The problem I have is with the late game, however going from let's say 16 stacks down to 8 is really just too much.

So, with that all said, I think it'd be reasonable to introduce the following: After 10 stacks, getting killed makes you lose 2 stacks. After 15 stacks, getting killed makes you lose 3 stacks.

To be clear, this comes from someone who has always liked the champs abilities, I just feel like it's hard to balance it when the ultimate is the way it is now. Finally, the numbers are certainly up for debate, but I think something like it sounds reasonable.