the fact that the reward is split between fixed cost operators and variable cost operators
Let's suppose that Dash Platform/Evolution attracts so many new users (thanks to its InstantSend/PrivateSend/Dapps virtues, all things you agree with) that MN operating costs hugely and quickly inflate: urgent need of faster, larger servers, protection against Ddos attacks, etc., you name it.
In your ideal model, MN are supposed to get 10 or 20% of the block reward instead of 50 or 60%. So what happens if the operating costs are wildly increasing, and the small reward part is suddenly not enough to pay those costs? After all, AFAIK, there is much uncertainty surrounding the technical specifications that will be necessary for each MN in the real world, if Platform gains some recognition and usage.
(Honest question, as I do not consider you as a troll. A troll is stupid and rude, and you're neither stupid nor rude.)