Leave steem power up as is at 13 weeks. Make the savings bucket a quasi power up that gets stripped of delegation, witness and sps voting rights, but lets you vote content, and gives you resources. Leave the withdrawal at 3 days or make it instant, build clear warnings into the UI. That way, only the people who vest for 13 weeks get a say in how the show is run, get improved security. The pop tart traders can pop tart to their hearts content.

Not many use savings anyhow...