Yup, so frustrating! They won't improve the copper because fibre is coming... and yet it feels like we'll be the last in the country to get fibre! (I'm sure some poor souls will never get it or, or have to wait longer than us).
If my connection is more stable on this firmware I might tweak my router settings as I know I should be able to get more speed from it. I currently have all the options selected for maximum stability instead of speed.
Last month I had 99 re-syncs. Last week I had 11 (most of the week was on the nee firmware), which is a big improvement. If stability is also improved I'll slowly tweak my settings towards speed and find the balance point.
However pretty much every time it rains, my connection drops immediately for a couple of mins, then re-syncs, so clearly water ingress somewhere on the overhead wires or terminations.