DYamanaka strikes the nerve again 
Let’s see if your topic will be moderated into closing like mine (in which I suggested free use for a short while).
- One problem (currently) is data can’t be deleted, so deadbeat users would leave their droppings on the network. (Secondly, if those droppings are public files, then the old problem of cheaper (here free) public data would be quite serious). This weakness applies to my “free” plan as well.
Perhaps your point 1) would be more practical if it didn’t apply to public data (i.e. non-free public data and free private data)?
Tweaking may be (and probably is) necessary, but with everything already significantly delayed, I think it’s better to not make changes at this point in time.
If I had to choose between a non-tweaked (current) approach and completely free use (initially, while the tweaking is going on) by April 2016, i’d choose the latter.