If you really think mining is the problen then POS is your answer
Reason being that POS encourages HOLDING and accumulation.
It simply rewards for holding.
I hope EXP goes to POS in the future like ETH
But a balanced mix of both POS and POW is more secure in the early stages of a coins evolution.
At this point that is the plan. There will be variations from Ethereum, but we will be staying current and will update when they do. Although hybrid is also an interesting option, POS should happen either way.