Interesting proposal idea. We're definitely seeing a 150-200 POB baseline for the higher end posts at the moment, but that too will drop over time as more tokens are realised into the community. This highlights the need for some form of scaling basis if the limit was taken on board.
We're always going to fall into pitfalls if we look back at reward allocation from the past and compare it to the present (I recall yourself and madstacks having large rewards in the early days quite frequently and fortunately you're still around in the community), although it is important for us to weigh up multiple factors if we are going to judge based on post rewards alone.
Discussion about over-rewarded posts and what constitutes that is a good step forward. I think this was needed prior to @trostparadox's proposal about downvoting because it was an unanswered question that left some uncertainty in the air.