Why I think this is pure shaving is based on how I see such characters as being built.
I am going to build a character he speaks with elemental spirits, I decide that Air, Water, Earth and Fire are likely candidates so I build 4aps; one for each spirit.
Now to fit neatly in an array they all ought to have the same cost. But after I stat out my four powers I realise that the air power is one point short of the total I am aiming for. I want to be efficient (and not using that point would be a waste of about 1% of 1 pp) so I try and think of something I can add into the air power to fill that last PP.
Then it hits me I can give one power in my set of air powers an AP, that will fill my last point. And even better I get 20 more points for a completely new power for the price of 1 pp in one AP slot that I was struggling to think of something appropriate to do with.
[sblock](I was trying to list all the characters that would be affected by such a ruling; not necessarily abusers so that everyone could look and see actual examples.)
Sierra and milion Masks only saved one point. [IICC]
I think Martin/Magus saved 11 by nesting, about 10% of his total.
It is much harder to calculate on Mecha I think the saving is about 4pp
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