2nd edition psionics:
- Did not have levels (or rather, had only 2-- both of which were immediately available at 1st level)
- Used Psionic Strength Points, not Power Points (which, while similar, lacked the manifester level cap Power Points usage has).
- Were heavily structured around checks that are kinda-sorta like skill checks, but not really (used the same model as Non-Weapon Proficiencies).
- Had scaling, but often scaled both/either on PSP cost and check result (Wormhole had both).
- Had in an absolute sense, fewer uses per day. This is largely a function of lower bonus Power Points. (The same can be said for bonus spell slots between the editions).
Wormhole in particular is problematic, as it readily filled all same-plane teleportion needs from short range tactical to cross-planet transit (though the later would require a much higher level to make the relevant check and afford the PSP).
The only real exception to this was teleportation when you could not otherwise move: this caused Dimensional Door to retain some important niche utility.
If we assume that it is a direct update of the 2nd ed Wormhole, we are largely limited to establishing a 2nd edition level based on its usage.
I did so some time back-- based on that usage alone, and including no other powers used, a 2nd edition psionist would need to be level 18 to match Laurin's Wormhole usage.
Since then, she's added 1 more Wormhole usage and 2 usages of Dimension(al) Door (which is also readily model-able for 2nd ed). That might push it up another level (I haven't checked). The other powers used would almost certainly do so.
But that would all be for a 2nd edition character, which she is not.