The 5.5a patch notes say:
The Command Experience (CXP) rewarded for the following planetary [Weekly] Missions have been greatly increased:
Iokath now rewards 10,000 CXP Oricon now rewards 6,750 CXP Makeb now rewards 8,000 CXP
But in fact, the weekly only gives as much CXP as the individual DAILY missions, which I think is 75 CXP. This is a very poor reward for a weekly set that is so time-consuming to complete.