- We need an Xbox-equivalent of the Playstation platinum trophy. You can call it an "Xbox completion".
- Each game should have an "Xbox completion" for completing the original 1000 gamerscore.
- For some older Xbox 360 arcade titles (which had 200 gamerscore, 400 gamerscore, or 500 gamerscore, depending on the type of title) there should also be an "Xbox completion".
- Each game should very explicitly segregate DLC achievements into their own lists, just like Playstation does.
- Consider Gears 5 - it has several new groups of achievements added on top of the 1000 gamerscore. For Gears 5, the DLC achievements should be grouped into 6 different lists, exactly the way TrueAchievements.com does it: Operation 3 achievements, Operation 4 achievements, etc.
I think that's all it would take to make me a happy man.