The main concern is activity: you have not managed to achieve the minimum activity requirement requested from Official Factions.
As recorded on 14th of January (one week overdue), activity has been lackluster. This naturally raised concerns, and upon closer inspection, one player accounts for the massive majority of the faction activity powertrading across multiple ships during the final month.
As a "rebel" Outcast faction having a natural, active enemy (IRMM and LG), we would have expected at least some degree of activity and interaction with your enemies, or a mixture of activities, as opposed to one player trading alone for the nearly the entire duration.
That's the general consensus that has been extracted from staff and main issue of why your faction was denied officialdom. I hope this clears up the fog over the decision.