Is there any way for an adept to change his powers after he has chosen them? I know this wouldn't be anything done on the fly, but perhaps something that would take a month or more to readjust.

Examples:

This one is very clean, and makes sense as a progression:
Adept with Increased Reflexes (2).
Increases Magic to get Improved Attribute (Reaction)
Adept increases magic again, and wants to trade out Improved Attribute (Reaction) for Increased Reflexes (3)

This borders on exploit of such a case, but also of questionable case
Adept with Increased Reflexes (2).
Adept gets Deltaware - Synaptic Boosters (3) (Yes 2.4 Million but this is just an example)
Adept now has 2 useless PP left (after the essense loss)

there's no way to do it in the rules.

And how do you get Improved Reflexes if you can only save partial power points?

Can you only save partial Power Points? Then thats even worse then what I was thinking, since there'd be no way to get Improved Reflexes (3), or even (1) if you didn't start with it.

Worst case I figured they'd have 1 PP floating until they initiated/increased magic again.