The less used Northern end of the MEL T1 lounge was closed off toward the end of January and fixtures removed.
Hoardings were put up sometime 1st/2nd February.
The current CL is adjacent to this area; I believe it may be absorbed by this new Business lounge.
Or perhaps, this will become a new PC/Workstation area.
Given the location of the escalators and lift, I think the former.