Late to the party, but here are my suggestions for a hypothetical 7e.
Create an SRD. This will be less of a functional game than a statement of principles and default assumptions. The core rules will follow these.
Heavily prune the skill list. It's bloated and overly specific in many cases. Some skills may be rebuilt as Talents.
Change Environment can be used to add or remove penalties, but only for defined environmental effects. "Create Light" is now here.
Images will only be used to create an image of something. No, "Images, only to create light." That's an environmental effect.
I am debating whether Size Change Powers would be better suited as Multiform.
Power Defense will be replaced by GM-defined, "Exotic Defense." If poisons or magic are prominent in a campaign, then the GM can define Poison or Magic Defense.
There will be a new section for, "Composite Powers." It is, fundamentally, powers built from other powers. Transfer would be one example, Reach would be another.
I'd probably also completely redo the default setting. Hero needs to be in charge of its own universe.