Michael (Dash Force China) explains Dash Evolution’s key paradigm shifts. For example, Evan realized to improve DASH network efficiency, the master nodes must have signification hardware improvements. This had lead to some (gradual) change proposals:
Increase Master node storage capacity, Gradually require master nodes to use better hardware (more RAM, better processor), slowly phase to SSD based storage.
400mb blocks = 4k TPS (transactions per second)