Oh, thank goodness... When I was messing around on Character Builder, that's more or less exactly what I found, too when I was making a Level 15 Ardent. My Level 1 powers were either better or more universally useful than the available higher-level ones. Here goes....
Level 1: Demoralizing Strike. Quite an excellent power; a -2 to all Defenses is huge. Augment 1 is great with the right party. Augment 2 is insane - a burst with a scaling defense penalty.
Level 13: The most comparable is Victorious Urging, but it's generally worse.
One of your allies gets the effective +2 to attack the target. Augment 1 is situational. Augment 4 is, IMO, strictly worse and more expensive than the Augment 2 of Demoralizing Strike.
Level 1: Energizing Strike. At-Will, it's solid and will remain useful until high levels with the scaling Temp HPs. Augment 1 is a quick, low-resource way to revive a fallen companion. Augment 2 is effectively the Cleric's Healing Strike, sans mark.
Level 7: Maybe Rewarding Strike? It's theoretically surgeless healing, but it's conditional on another ally hitting and thus IMO less useful in general. Augment 1 is very situational. Augment 2 gives a whole lot of healing potential, but again that healing is conditional on your allies hitting. I'm not sure I'd switch, frankly.
Level 1: Focusing Strike. A saving throw is always handy. Augment 1 is situational. Augment 2 is basically Saves for Everyone.
Level 13: Finally a strict improvement in the form of Revelatory Strike, along with flexibility. (I probably wouldn't have taken Focusing Strike in the first place, though, but YMMV.)
Ire Strike: Basically, it's psionic Commander's Strike with a Vuln 2 All rider effect. Solid. Augment 1, situational. Augment 2 is very beefy, with ally movement, extra damage, and a scaling vulnerability rider.
Level 7: Mindlink Strike. Unaugmented is basically the same, but instead of vulnerability, you can shift. I'd rather have the vuln, but YMMV. Augment 1 is probably not worth it, unless you have PPs to burn. Augment 2 is a burst, but I think it's more situational and less useful than Ire Strike, overall.
Level 1: Psionic Shield. Um, honestly, I wouldn't take this one.

But in this case, the Level 13 Revelatory Strike is strictly better.
I think that's my beef, honestly. Until epic levels, it looks like the Psionic At-Wills don't really get
better.
-O