Also with psionics, your ML factors into how many bonus PP you get, so this would help with that, too. Not sure if that's what X-Codes was talking about or not.
Well, and that's where magic and psionics diverge. With this variant, a multiclassed caster wouldn't get any more spells than normal but his spells would say potent (other than DCs
*). A multiclassed psion has the issue of needing PP to augment. Giving those PPs out is a boost that the caster wouldn't be getting.
I don't see any easy way to get this to work with a point-based system. Giving out free augments makes 1st level powers
much better than higher level ones in an effectiveness to cost ratio. Giving out free points gives them more uses per day.
Perhaps a half-way point would be to give out extra points in a separate pool that can
only be used for augments. Maybe that would let us have our cake and eat it too.
EDIT: Would this change also effect Initiator Level at all? It currently actually has an "out of class" advancement rate of 1/2 HD. To have CL go from absolutely nothing to double that ratio seems...wrong w/o also making IL go up by 1 for every HD regardless of where it came from.
Initiator Level is a weird beast in that it also affects the maximum level of a maneuver you can learn. Martial Adepts don't have a hard-coded progression built into their class. If that were added in, I could see giving IL = HD in for them. Although, a lot of things don't scale really, so it's also not as much of a boost for them as it is for casters.
I'm working on redoing maneuvers so more of them scale (particularly Desert Wind), so I'll have to see how I feel about that later.
* On a side note: how do you feel about mixing this idea with setting all DCs to be 10 + 1/2 HD + ability mod? It lets your DCs stay competitive on your lower level spells. It makes it easier to multiclass. The downside is this is a wholesale power-up to a straight classed caster (mostly, they're technically one DC behind on their highest level spells at odd levels).