GAC is coming and many of us are excited with it. New content, new game mode, lot's of fun incoming but also a higher time investment. I think it is the perfect time to sim the AAT.
If you asked me I would also say sim the sith raid but I understand that is more controversial. But AAT is highly out of date and will be even more after g13. Still, a solo requires 30-40' and it's not even 100% auto. Perfect timing for the simulation!