Hoi,The important thing to recognise is that the names of languages is only one aspect of what makes the CLDR. There are many more details to the CLDR, collation for instance. This is where the WMF is not that interested in following the standard even though it recognises that the point made by the CLDR is valid.
What both the WMF and Unicode need (CLDR is a Unicode standard), is the information that is what the CLDR is about for any and all languages. For Unicode it is vital that the standard is correct.. as correct as humanly possible. When the WMF was to collect all the information needed for all languages, when it would use it with the explicit understanding to have it flow towards Unicode's CLDR standard, there is a chance that there will be winners.
However do realise that this is hard work. You will need to improve cautiously on the existing processes and data. It will take a considerable amount of time and it can work.
Thanks,
GerardM