You never had it before so it won't make any difference that you haven't got it now.
as I said previously any connection information you can get from your router - connection speed, max attainable speed and noise margin + more if there is anymore
I am also on ECI so not the end of the world
The move to BT Plus resulted in a DLM reset to an open profile. Once DLM has figured out the best speed your line can support, it will apply the necessary options to achieve it. With an Huawei cabinet, one of those options would have been to apply G.Inp but that is not the case with ECI, however you didn't have G.Inp previously in any case. It can also apply interleaving which should improve your speed. It might decide your line is suitable for a 3dB noise margin rather than 6dB. It might be that your line was previously running at a higher speed than it should have been but not enough for DLM to take action to reduce it but now DLM has started again from scratch it may set your speed lower. Give DLM time to take action, @stereohaven in the other thread you have posted on has seen his speed return to previous levels.
So I am very impatient - let it be said before we start..
This morning saw me rock in at 41 and just now 43 via Speedtest Net and BT Speedtest says 46 coming into the house.
Humble Pie eaten 🙂
I have same issue - see my thread.
2 weeks, only interrupted connection when Openreach using test socket ... did not improve at all when left. still 33 mbps was 45+ before the "upgrade"