Hi 
I am developed AssetRefs exactly to vercome all those issues with addressables when they was released
Today they already work with new ContentDirectories of Unity 6.6 and I think for Unity 7 I will create new major version that will be just thin layer on top of ContentDirectories because new ContentDirectories and their Loadables 90% looks like AssetRefs
About asset Refer34ncing and bootstrapping your game from any place I have already done this too with additional test cases to not only launch from any place but also with exact situation you want to test
You can use it already free there is free version of it if you interested: Flexy.GameFlow
Or better just check template to see how it all works and test it with ContentDirectories
If you have any questions ask me in any place
Also there is topic about ContentDirectories what they can and what they cant today New Unity 6.6 ContentDirectory GOOD and BAD Q&A