I haven't originated out of C/D in a couple months, so not sure how new this is, but the tensabarrier lines for the D checkpoint now extend much further out into the terminal, and the CLEAR lane is now a dedicated CLEAR+PreCheck lane (I assume there is a CLEAR-without-Pre lane elsewhere)

Once airside, I happened to be walking next to a TSA employee on my way over to the C terminal and asked about potential re-opening of the C checkpoint and they said "not anytime soon"