Presumably the cam locks and the 'Tool Less removal' are 'elf and safety - to stop BT engineers stabbing themselves with screwdrivers during an install.
For a good connection I would guess that IDC may still offer lower resistance as this cuts through any oxidation on the surface of the wires. It's possible though that the cam lock connection has a greater surface of contact which helps lower resistance.
I can't see any reason for anyone to change from earlier NTE5 models to the latest though,. I'm sure it won't improve broadband performance.
I still have a 1955 vintage BT20/4 junction box where the external line comes in and that doesn't seem to affect my broadband performance.
Looking at the pictures, a new VDSL2 interstitial filter plate will have to be designed to match this. I wonder how this will work as the house wiring is no longer connected to the removable section.
Edited by caffn8me (Sat 09-Jan-16 13:33:16)