Thanks for your reply @steemchiller! As you mentioned, Steem Proposal System shouldn't be for Witness but REAL developers.

This is just my personal thought, but I think that in order for more users to vote, there must be an incentive. At the same time, a minimum registration fee is required to prevent overproposal abuse. IMHO, 100~1,000 STEEM would be acceptable. I think it would be better to discuss this issue in more detail later.