Okay... I've now got the two connections bonded and running through the RPi
It seems to work well. Just did a Facetime call and Starlink dropped multiple times including two 12s and two 15s outages. Quality degrades when switching to Hughesnet and things freeze momentarily, but it works okay.
Also, I am using the Speedify automatic DNS which defaults to running Adguard. It's basically like running a Pi Hole for the network, but the processing happens on the VPS server end rather than at the router itself.
I haven't really noticed anything except when I tried to visit Volaris Air (
https://www.volaris.com/ ). The site will not load at all. I have never been to the site before and probably will never go again, but was just testing things and ended up there. Pretty interesting though. Unlike an Ad Blocker, I have no insight into exactly what is getting blocked.