Have you ever considered reducing the % in SP allocated to accounts that are powering down vs not powering down?
Maybe just during the distribution phase?
Otherwise I agree with the rational approach you've put forward.
In fact I think lower prices are better at this stage, they will allow for a wider distribution of power.
I too think we should tweak the advantages of those being constantly powered up between others powering down.
This gets too complicated. The learning curve is steep enough as it is. This has always been a problem in crypto.