Great news! It works!!! The web server on the device is configured to listen on all interfaces. I am able to open the web interface via both IPs!
Only hiccup is that the firmware files were not included. By manually adding them into /lib/firmware, they aren't picked up at boot since the overlay file system is mounted after everything is loaded. That's my fault for forgetting to request these files be added!
Simulating a usb disconnect/connect makes everything work!
If you could please also add the following firmwares in /lib/firmware and /lib/firmware/ath9k_htc (they are included in the vanilla kernel) :
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mt7601u.bin (in /lib/firmware) : Making sure you're not a bot!
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htc_9271-1.4.0.fw (in /lib/firmware/ath9k_htc): Making sure you're not a bot!
Doing this should make it so that the usb device will be detected on boot!
For those who also want to have wireless on the Comet: I specifically chose those 2 wireless adaptors (MT7601 and AR9271) because they are properly supported in the vanilla linux kernel on arm. Yes they are only 802.11b/g/n 2.4ghz, but they will just work! Atheros AR9271 is a better choice since the stack is fully open-source! You can find them for a few bucks on Aliexpress!