I shut down my wifi at night. In the morning, when I turn it on, the Deco M5 will choose its channels for the day. I've noticed that when it chooses a lower 5Ghz channel, like 36, the transmit rate on my computer is lower, and when it chooses a higher channel, like 48, the transmit rate is higher.

Quite simply: Please offer the option to manually choose wifi channels.