two things...
1) If it's not too much trouble, what is the link to the newer psionics SRD that updates it so it's better?
2) as far as the Damage Save system, the system in Mutants and Masterminds/Unearthed Arcana and the Damage Save system in the Advanced Player's Handbook are fundamentally different.
In MnM/UA, the Damage Save is a modifier vs. 15 + modifier.
In APH, the main difference is how the Damage Save is calculated and how the attacker's damage modifier is calculated, and it is in this difference that the APH system should not be considered the same as in MnM/UA.