I just took this ability in Beta 5 .83. Now the population on my new planets are dying! They drop .1 per turn until they reach base population (5+ modifiers), and it can take a while to build farms.
Suggestions:
A) Reduce to +3 pop, same as a fully loaded colony ship.
Change it to "30 stored manufacturing" boost so you can build your first level 1 building in 1 turn.