Really?
Based on what exactly?
I mean to say, what leads you to that conclusion, in parts?
I mean Psi wars can cast polymorph after all ,and doesn't a psiwar have more mobility options than do the martial adepts with the possible exception to the swordsage?
3 things and an addendum.
1. I find flexibilty a vague term in this case what exactly makes them more "flexible" to me it seems they're doing generally the same things at about the same power levels.
2. Mobility. There are plenty of mobility options for both sides of this but there'e more for the psi-war. Because they get things like Teleports yes but also hustle and slide and swap etc...
3. General niceties: Again vague but these guys for thier powers have all the "general niceities" one can think of really, including the ability to grap spells off any other psionic class power list. Moreso. Things like freedom of movement,
Addendum: I was wrong completely wrong about catapsi, forgive me for the misinformation.
I just wonder if I'm the only one looking at this things "powers" list from the Srd. There's a lot of great stuff there.
...but alas... I digress... I've had my say. I'll speak no more on the matter, for now.
Fair enough. I guess if I had to put my finger on it, the answer would be that the system martial adepts use is slightly superior to the system Psiwars do. Sure Psiwars get some options that are more advanced/powerful than the Swordsage's, for example, but their use of them is pretty limited due to that lovely thing called Power Points. At their 'basic' level (i.e. no augmentations), sure, PP cost doesn't seem like such a big deal. But when the costs start to pile up is when you realize how screwed for it you are. Meanwhile, the martial adept is doing the same things he's always done, over and over and over again, without having to worry about running of PPs. This is what I mean when I say that they have more flexibility.
As for mobility, yes, Psiwars win again with having more choices for it -- but they are, AGAIN, stumped due to their overall low progression of PPs. Granted that stuff like Dimension Door and Freedom of Movement are nothing to sneeze at, but you can only rely on them so many times. And when you get to the higher levels, even those won't save you (granted, the same is true for martial adepts, but who -isn't- screwed besides casters on those levels?).
As for 'general niceties', I used this to refer to the class features outside of class power/maneuver progression. All the Psiwar gains are bonus feats. Granted more feats are always nice, but between a feat and an actual class feature, I'd grab the class feature any day. Unnamed bonuses to initiative that stack with Improved Initiative, Improved Evasion, Wis to attack/damage rolls when using strikes, bonuses on saving throws, and Wis to AC WHILE you wear light armor? YES PLEASE! Sense Magic is also pretty darned nifty -- how many bashers gain the ability to identify weapon/armor properties in 10 minutes, at NO COST? Even the darned Wizard has to shove 100 GP down the toilet when he casts Identify.