Yes, but that's just one of the three you listed (CX).

BA Blue's priority waitilists is better than nothing, but only would be noticeable in a very few situations I think.

A couple fundamental questions arise though:

1. If you collect miles with another airline in the same alliance, whose miles don't expire (with activity every so often), is it worth it to switch to one of these airlines (where miles do expire with no recourse after a few years in the case of the Asian airlines) just to get these benefits when flying that airline, or is earning miles you can keep more worth it?

2. If you redeemed miles from another airline, do you need to switch your FFN to this airline to get these benefits, or can you just flash a card (is there a card these days, even)?