all the changes probably has increased your noise margin and dropped your conenction speed hence lower profile. if connection stays stable then noise margin will drop and speed increase as will profile. another test later may show everything ok now
Issue appears to have resolved itself after ~3 days of very low speed.
Last test I did, at ~10 PM today looks ok:
Download speedachieved during the test was - 15.73 Mbps
For your connection, the acceptable range of speeds is 4 Mbps-21 Mbps.
IP Profile for your line is - 16.49 Mbps
Thanks for the help.
Looks good. Stable connection has paid off