So what are the router stats for both lines now then?
I agree strongly here. Go and do it now, before they migrate you back. The line statistics will be important.
Include as much detail as you can - SNR, Bit loading, connection times & error counts. And try to keep some of those over time, before the migration happens.
Just to help later. For now, collecting data is important...
Nothing on the current BQM shows any problems with throughput, the yellow and blue simply shows some rises in latency consistent with you using the connection.
Or worse, the yellow & blue just show what is going on in the ISP network, or the 20CN link, and not your line alone.
I've been doing almost nothing on mine whatsoever. You certainly can't see where I went to bed! My Broadband Ping