FFG intended Force and Destiny to beplayed Lightside, of course, but unlike other versions of starwars, the punishment for going dark is actually fairly minimal. On the other hand, because of the light-side focus of the alpha testing, the Dark sides of the various force powers have been under-tested.
What force powers do you feel are too strong in the hands of a darksider? What is too weak? *coughbattlemeditationcough* and what do you think can be done to improve the balance of the Force?