Remember that the development time of an IA product is about a year from concept to production.With a droid based wave, the only thing I'm bummed by is there'a no K2-S0. It's a perfect opportunity for him.
They got two Rogue One releases out for X-Wing already. If they can manage that turnaround, they could've done it for IA... if they'd wanted.
That's interesting... I wonder how they manage that. Maybe the level of thematic tie-in is less important for X-Wing ships/crew than it is for Imperial Assault figures and missions?