AP mode VS Router mode.

I have BD BOX 2 and (6) ASUS XT8 in mesh.

In router mode, ASUS UI has a lot of features and manages my 70 some devices very well. I have since set my router to AP mode and the BOX 2 is watching over things now. It's hard to get use to this and I'm wondering if it's worth it.

Question:

  1. What is the advantage to letting the BOX 2 manage all my devices instead of ASUS UI? Thank you iin advance for any help trying to understand all this. :)