I notice STEEM POWER hovers around 60 to 70% of stotal Steem.
This means 30~40% is liquid. That is enough in my opinion and I am not aware of any shortage. Who knows if cha ging this ratio to be lower (more sp) is good?

More people are already powering down than powering up on a daily basis recently. I don't know if this is good or bad. Changing dyanics to encourage further power ups may also encourage further power downs.

SP is used for important things like sps voting rewards and witnesses, allowing exchanges to swoop in and 'experiment' for a 4 week delay instead of a 13 week delay may be a death blow because it will allow quick and potentially devestating attacks..

Changing the powerdown from 1/4 a year to 1/13 a year seems like too much risk for too little rewards.

Moving inflation from just holding sp over to the 3 days saving bank may be a safer option. Can profit from this withoutntoo much influemce and reduction in liquidity. option.