Well, yes and no, indeed I updated to the latest version of the dallongo plugin which gives some new AMS dedicated properties(I had the request numerous times) but it's still possible to run with the old plugin with ams by using the rf1 entry, and so stay compatible with crew chief.BTW, speaking of Crew Chief and SimHub, it seems that the current version of SimHub installs a newer version of the AMS plugin than CC uses, so it's either CC or SimHub right now, not both at the same time.
It's fine with 6.5.4 as it uses the older version of the plugin.
But I'm guessing it's more of a Crew Chief issue with CC not using the up to date version of the plugin just yet...?
But you are right in a way: if I don't write this trick anywhere it's just like it does not exists. I will write it in the game configuration documentation.