I know Dec 15th is quickly approaching and they indicated that they would wait until more players became available to trade... so it may just be a timing thing.
However, the only other notable change in recent days is Trader Joe is now in charge of Portland. Hopefully he is in the trenches trying to facilitate a trade.
I still think this 3 way would be really good for all teams:
Brooklyn: Kyrie -> CJ
Irving is out and not playing. Here they get production out of the $30M+ that they are spending. CJ would look phenomenal next to Harden & Durant. Additionally, they'll save ~$20M in tax this year alone!
Philly: Ben -> Kyrie
Kyrie could at least play for the 76ers. Again, they get production out of the $30M+ that they are currently spending. Morey gets his all-star. Kyrie + Embiid would be a great combo.
Portland: CJ -> Ben
Portland gets a lot of value in this trade by helping facilitate this transaction.