As far as I can tell, most/all the AI behavior is as brain-dead as ever. FS Traffic merely inserts traffic based on historical real-world traffic for the locations you’re flying between, using the correct models and liveries.
The crazy stuff the AI does is pure stock Asobo. Yesterday after installing and while checking it out, I watched a heavy Lufthansa flight arrive on 28R into KSFO, touchdown and rollout on the lead-in approach lights, then make a high speed hard right turn off into the Bay and begin a 3 hour tour or something.