PCB layout and components difference can not be exactly the same since the system design is not identical. At least, the RAM size and RAM vendor are not the same. How can you suggest this DDR freq fix can apply to others.
I would like to have good SBC playing around for sure. Totally agree that speed and reliability are both important.
Users also expect the robust or serious test are done on the products they bought. I also hope so on my two SBC . (Raspberry Pi2 and also roseapple.) Although i am a rookie to study SBC, but I don't have time or interest to test the device stability and data integrity now because I am not able to hit that high capability level like you.
Respect linux-sunxi community, and they already did lots of contributions those years. I also expect a community being similar way to them whoever Actions-semi or others communities can be in the future.
Meanwhile, you also provided many suggestions and expectations to those parties. This is very nice, the outcome depends on how those parties or their followers go continuously.
The last, like you posted some reference boards, we do have many alternatives.