I think the change you're describing would only matter to middle to low level users. They might think that posts don't deserve as much of a reward as they're getting.
However, the major issue on the platform isn't the low and medium, it's the high. The power distribution is so that the amount of influence new people have will never ever match the influence of the old.
Meaning, the rich stay rich and the poor stay poor. Just like in real world capitalism!
The thing that would make sense is to make the amount of influence non-linear. But that won't work, because then people will simply split up their account to maintain the same amount of influence.
No amount of twiddling with the reward distribution would matter, as long as bots exist. This platform is supposed to have proof of brain, but you don't need a brain to use the system. A bot can do it better. Find a way to make sure the people using each account is real, and that each such person only has one account, is the only way this system will survive as anything other than a circlejerk.
Definitely, a proof of "author existence" would be a way to go, but in a real distributed world with a huge amount of different countries and legislations we would have to stop several countries from existing on steemit, because these countries make it too easy to create fake identities.