I see it like this:
Manager (M) to the Dev (D)
M - we need to remove mission journal. It is too compact and straight for our new photon doctrine.
D - So we’re finally moving it all to the agency? One place to rule them all?
M - Nope. We will create a new window competitive to the agency and move there missions that would be somwhere at the bottom mixed with all other useless for a regular mission runner stuff. And RP mission stuff to the industry window since there’s a “research” word in their name!
D - Omg why?
M - No reason at all.
P.S. There is a yet working way to bring back the journal: