The only exception to that would use Substitute Powers, and have a rather long conclave to figure out what
exactly a DM wants to do.
And, you could probably fudge in the sub powers enough, that you basically are still playing by those rules.
(sounds complicated and inexact, because it is, and there's no real
right-right answer)
I'm not sure what the soundbite and tight version of this "should" be:
Imo your maximum power level known section for ardents should be separate from their level progression, if you make one. This way you do not confuse people when employing the practiced manifester feat.
But wouldn't the "effective manifester level" still follow the same "maximum power level known" schema even if it is out of sync with the class level?
The table you posted would work just fine in most games.
But really, wotc had years to post an errata'd table and didn't.
So the old psi-board and old CO-board interpretation, is still a possibility.
Must resist temptation to start about bloodlines and psiotheurgist feats.
Must ... resist ...