yes since upgrading the max data rate has increased from 82MB to 87MB and the connection IS interleaved im guessing as my latency has risen from 14ms to 21ms, I cant access any more stats and is why im wanting a new router to do so
the cabinet is an ECI cabinet, I just tried my Lantiq Plusnet Hub One (BT Home Hub 5A) as it has a Lantiq chipset same as the Cabinet DSLAM and I got a lower sync, results below:
Pllusnet Hub One (lantiq)
5. DSL uptime: 0 days, 00:03:36
6. Data rate: 20000 / 71141
7. Maximum data rate: 29085 / 82273
8. Noise margin: 12.1 / 6.0
9. Line attenuation: 14.0 / 14.2
BT Home Hub 5B (broadcom)
5. VDSL uptime: 9 days, 08:06:58
6. Data Rate: 20000 / 73136
7. Maximum Data Rate: 26372 / 87214
8. Noise Margin: 9.4 / 5.9
9. Line Attenuation: 13.9 / 13.9
I've already asked on PN forum if they can help but they said there is nothing they can do apart from request a stats reset which has been done as I upgraded.
oh well, I will just have to live with that, I suppose it gives me more buffer for crosstalk on customer uptake.