Not even I know ALL of the changes that are made to each new UEFI revision, indeed even my main contact doesn't know all of the changes all both of us know is that some changes are highly complex so outside of the people that work on fixing the UEFI bugs nobody else would fully understand the changes anyway. Even if I were to ask my R&D contact he probably wouldn't say too much simply because some changes would probably require a very complex answer which, again, anyone who doesn't work on the UEFI won't fully understand. All we need to know is that any issues I or others find that are narrowed down to a UEFI problem in some way I report, and Asrock do their best to fix them