Use the force
Everything is proceeding as I have foreseen
Apparently FFG has changed their mind: the PDS cost is now 2, as in the offical Errata/FAQ document on the FFG website.
That seems a bit more balanced to me, but I have not played the game enough to really know.
from "FAQ and Errata, Version 2.1" first page:
The accurate cost of acquiring a PDS unit is 2 (as written in
the rules, but incorrectly stated on the player sheets).