The Proposal Threshold was recently lowered to 65,000 COMP a month ago in Proposal 52, following a meaningful discussion on the topic.
In addition, it only takes 100 COMP to create an Autonomous Proposal and gather community support for a proposal.
Rather than spending more time on meta-governance (modifying the governance parameters), I am interested to see more protocol-changing proposals–quality ones are likely to garner community support.