To me it makes no difference what so ever, whether steem has a 4 week PD or a 13 week PD. Makes absolutely no difference at all.
You're not here to provide market liquidity, and I would argue that most people that bother to power up for any time frame are not either. They are expecting that there will be a meaningful change in sell side liquidity should the lock down period decrease by that margin. While I'm certain it may add something to the liquidity, I don't think it will be meaningful unless the lock down period is zero (which we know is untenable).
What about not burning steem and actually voting authors to add liquidity? I'm not sure if the act of burning supply is compatible with trying to increase liquidity. I suspect some people here are trying to have their cake and eat it to.