I find it difficult to understand what use ever finer detail will be to a landing captain.
What if you had the details of the winds for final? If you are on final with a slight tailwind or crosswind, and at 120m, the winds shift to a strong headwind? Would you find that information useful if it could be provided? (even strong headwind aloft to mild headwind at 100m overspeed)
I noted at locations known for windshear that there were several GA in a row, but on second attempt, all landed. That was due to the situational awareness, so if you had that information to begin with, would there be less chance of a GA?
Other than simply windshear from ATC, would not the details and flight level of the windshear be of value?
Same for DEP, what if surface winds are calm, but at 100m you have a strong headwind, ATC says windshear, but what are you set for, calm winds? Would that not help?