This would increase passive ROI for HP holders without raising inflation. Thus making it more desirable to power up but also gives investors a way out if the coin pumps 100% in a day

At least if for nothing, it's it course a win-win situation; incentivize powering up and also give people who want a way out a means to do so, 13 weeks isn't bad either but then considering an investors point of view it might not be so cool. But at the end we must find a win win situation for especially for investors who want to stay powered up but take advantage of the prices at any time.