Few questions:
How exactly does applying metamagic to your spell like abilities work? I get you have to be spellweaving, but what's the process?
The Plant Eldritch Ascendant gives you (Su) abilities, this means they ignore XP components, yes?
The construct permanency at least 1 round/level is clearly intended to block off the obvious wraithstrike abuse and the like, it currently also blocks off any spells at all with a fixed duration, is this intended? If not, perhaps make it so that it's any spell with a base duration of at least 10 rounds?
Finally, one things I noticed was that all of the special Ascendancies require the feat itself, so you wouldn't be able to take them if you get the list from being that type natively.