I think they are fairly balanced with an interesting combo.
The Level 7 ARC-170 build that I am playing now is:
Push the Limit, Hobbie Klivian, and Jake Farrell for EPTs (Have not decided on last one yet). With Targeting Astromech and Kyle Katarn.
That gives me the following options:
Perform Non-Red Maneuver (I should almost never start the turn stressed). Take Focus for my Action and do a Jake Boost or BR, PtL to Target Lock. During Attack, spend Target Lock, Remove Stress with Hobbie, Gain Focus from Kyle, and reposition if needed with Jake (whichever option I did not take prior). Net Gain: 2x Focus, Target Lock, Boost, BR, and No Stress.
or
Perform a Red Maneuver and gain Stress. Gain TL through Astromech, Loose Stress with Hobbie, Gain Focus from Kyle, use Jake to Boost or BR. Take Focus for Action, use Jake again. Net Gain: 2x Focus, Target Lock, Boost, BR, and No Stress.
Now to decide what to do for my last EPT...
If you PTL to target lock, Hobbie would remove the stress then and not when you use it, his is when you gain or spend a TL remove a stress.
I was going back and forth on that, the reason I settled on not removing stress is according to the FAQ you receive the stress for PtL or Ex. Interface after abilities resolve. So the stress would not be there when I actually take the TL action.