CNET is saying this is the final markup of the legislation. So its likely the content of the bill is finalized, and its just a matter of votes.
Politics isn't my thing, but from what I read about this, I have a very different understanding. Because it was a tie vote coming out of the finance committee, it is in a very weak position for passing, and certainly not in this exact form. I can't imagine the Union clause standing, among other things.
I found this article helpful, and specifically the 2 links at the end of it. One is to the 76 page finance committee recommendation, and one is to the 17 page addendum that you had linked to above. It is important to also read the bigger document. The most important piece is simply eliminating the manufacturer-based limits that currently exist, and provide a new framework for the credit phase out. This is in the larger document and timing is defined as:
The smaller modifications document adds in the $2500 US-made and $2500 Union-made credit along with the $80k limit. My read of it is that THESE start after Dec 31,2021. So, might it be possible that someone could still get the $7500 credit on an EV greater than $80k, at least if bought before the end of the year, IF this form of the legislation were to pass?
Once again acknowledging these are proposals for legislation. Nothing has yet changed from the $7500 credit that already expired for Tesla.