Power break down

So...powers and how to break them down into meaning ful ideals that can be expressed as numbers and dice. The hard part in other words.

(I do feel like I'm talking to my self in this blog, and I largely am, but it helps anyways.)

Most of the power systems I have seen have treated powers like sets. For example one of the worst and most powergaming systems Palladium...If you have "energy control" you get 5 little powers that fall under that heading. Same with Aberrant (one of my favorite systems but least favorite worlds). Looking at the comic books and other systems I think breaking it all down into individual powers that can be bought at a cheap rate but only do 1 thing might be more effective.

Lets look at the body transformation guys out there.

Iceman- Icebody, Ice generation, ice shaping, ice blast, ice enhanced movement modes. He pretty much gets it all at once.

Johnny Storm - Fire body, fire blasts, fire based flight. I'm not a huge fan but he down't have the fire control powers of Pyro. But then again Pyro doesn't generate flames like Johnny (Pyro has flame throwers for that).

Collossus - Metal Body, enhanced strenth in metal form ( a weakenss based upon another power being active simuteneously) but no control powers or blasts. Leaping maybe.

All of the above transform into an inorganic (something). They all get s suite of powers that compliment their transformation but the set isn't as complete in some as it is in others.

So if we break it down- what we are really looking at is several different powers with different fluff.

Body Transformation - turns your body into another substance
Enhance movement mode - fly/ice surfing/extra strength leaping
Manipulate element - allows to shape/animate a substance
Generate element - produce an element in quantity
elemental blast - shoot element X for appropriate damage

Now the real question lies in how to break down the manipulation powers- is each separate shape a power? - this would make Green Lantern extremely expensive to make, even with his numerous weaknesses to counter that.

Or are there some basic shapes that can be used as separate powers? ie- wall, hand, etc. Or would that come down to a power control skill roll?