What methods to test the new firmware on the access point?

Question

WiFi

You need to write instructions on how to test a wi-fi access point after firmware. What means to test and what else is needed besides speed and coverage?

Answer 1

Connect 100500 devices to it and disconnect one at a time until the point starts to work stably. And yes, devices must download torrents. A kind of stress test.
--sarcasm--
50% of the answer to the question is in the question itself:

what should be tested