Local network management on x1 router now unavailable and telling me to use the android app

I use the local network management tool a LOT (going to 10.0.0.1 in my browser) and now it's giving me the following message: 

"Managing your home network settings is now easier than ever. To manage your gateway settings and other features, please download the Xfinity xFi app."

I am not interested in using the xFi app--I check connectivity and set/unset static IPs etc. quite a lot. I need the full management interface, not the bone-simple version on my phone that's also, by the way, sending  configuration info back and forth over the internet. I already pay to rent this modem, I want control over what it's doing inside our house. I have the modem with 4 wired gigabit connections as well as the wifi. The only reason we're renting is that Comcast doesn't seem to actually support customer-owned equipment (even approved models), or doesn't do it very well.

This is approaching dealbreaker status. Anyone else seeing this?