There are some rumblings that ambassador (formally known as Concierge Elite program) is for the top 1%. However, from what i've read, it just seems like an addition of a dedicated concierge agent and also heard that non PP people participated in the program.
You can read a previous thread here about it:
Marriott Ambassador vs Platinum Premier
There's even an FAQ on the program:
https://www.marriott.com/marriott-re...ncierge-faq.mi
Hopefully they will sort this out before they launch the new program.