As it seems that
CSM will not get an update this year, I've decided to write a fandex.
I feel that decurion detachments are a bit too restrictive for something as diverse as Chaos is, so I made an unique detachment other way: it's like
CAD but focussed around
HQ and Elites/Troops, whilst
FA and
HS are supporting elements. For each
HQ (1-3) an entire detachment can have one special trait like Assault rhinos or improved leadership.
To make non-fearless units more viable without just making them same as loyalists, Champions of Chaos are Fearless in
CC and return their unit from Ongoing reserves if they fled off the board, and units can act normally in the turn they Regroup (but no auto-passing).
I like 3.5 codex character customisation, and made a Gift table in wargear list.
Every unit was tweaked, like basic marines are better in killing stuff on objectives and Chosen can infiltrate etc.
Possessed should be T5 and have rending
imo.
There of course are

obvious updates like:
Chaos land raider option for 16 capacity
Icons work like locator beacons + regular banner combat resolution bonus
Drop Pods and new special/heavy weapon options
+2 attacks to Helbrutes, cheaper Chosen/Terminator melee weapons, Vehicle squadrons to match loyalists update
Warlord trait and Psy power tables doing something meaningful
Cult terminator/lord uprades and Juggernauts/Disks for Chosen
What do you think of it? Are there

or still overcosted units? Can it be used to build fluffy lists? What rules wording are mess?
Which Warlord trait should Fabius Bile have?
Apologies for spelling, my poor English and word abundance (pdf is 32 pages with all the tables).
Edit: file update
fixed Daemon prince of Tzeentch could have 2+ re-rollable armour, gifts are separated from wargear in army list and other minor changes.