I tested out the Source 2 Filmmaker included with Half Life: Alyx. After a...process, we'll just say, I was able to get models converted and test everything out on Source 2!
I have annoyances, such as no Ambient Occlusion, rigs MUST be made inside the Filmmaker, so no organization, and I also had to create a custom eye model.
Buuuut in nearly all other aspects, I think it's FAR superior to the original version!