"Core" is not proposing anything, that difficulty adjustment hard-fork proposal was brought up on the mailing list by a member of the community and is in early

"Core" is not proposing anything, that difficulty adjustment hard-fork proposal was brought up on the mailing list by a member of the community and is in early discussion stages. There's no consensus that this change is necessary, and there hasn't been an in-depth discussion about how and when it should be incorporated (if accepted) and whether it should be alongside the block-size hard-fork or separately.