The EU4 release at 15:00 is rather and exception. Just wait for the official release hour at steam 19:00 PM. I am pretty sure you will see it than.
There is a new customizer dlc for CKII coming out today in conjunction with EUIV, there's super thread about it either on the second or third page.
Scratch that, it's right on the first page
Customizer? Yeah, that'd be awesome. I'm still (im)patiently waiting for Steam to push the new patch.
Steam never fails to screw up Paradox release dates. Expect it at Valve's earliest convenience which is anywhere from tomorrow to next week.
Should be out in around 20 minutes, that is the normal steam update time.