I'm literally using Mesa git.
And I recommend it to anyone who use OpenSuSE (pontostroy repos) or Ubuntu (oibaf repos).
Its easy, Its quick, and very benefitial.
And for sure its good to know that form now I need to set that HyperZ variable.
("But its beta" is good excuse for CLOSED source projects, where onlything You can do is hope for the best, and only priorities of devs matter. In FLOSS You can grapple with the code Yourself. As some comment above showed.)
(Never played AB, though I have nothing against them nor against casual gamers, You included. As long as You do not demand that others start changing their behavior.)