Asus RT-AC1200G+ wireless prof settings some options missing

I wanted to tweak some settings and see if i can get a better performance but to my surprise a lot of the pro settings under wireless has gone missing, Ive performed a factory reset (hold reset button 10s) and its still not showing all the options, I only have the following:
Enable wireless assist, igmp snooping,multicast rate,ampdurts, rts threashold, dtim interval, beacon interval, tx burst, airtime fairness.


I remember it allowed me to toggle more settings such as packet aggregation,...

Asus RT-AC1200G+ wireless prof settings some options missing