For Chinook Wawa, there are several different orthographies. One of the more useful ones in my opinion is the BC Learner's orthography precisely because it simultaneously uses the regular Latin alphabet, no ambiguous accent marks or novel letters, and also includes enough information that a fluent speaker can differentiate everything needed.
I think reviving indigenous languages is important, but there are also 34 different indigenous languages in BC, in 7 different language families. Part of revitalizing languages is making them accessable.
Returning to my Chinook example, although I personally think Chinuk Pipa is the most "legitimate" orthography due to historic use, and the Grande Ronde orthography is probably the "best" in that it is most accurate, I would have to concede that the BC Learner's is the most useful, because it makes the language accessible, and invites people to learn more. And it's good enough.
A poor Anglicized transliteration at least can get the new name being used.
Sorry about the rant, this is just a topic I have strong feelings about. I fully accept that my opinions are not authoritative. It's a complex topic, but this renaming does highlight one of the hurdles of language revitalization, and many of those 34 languages are critically endangered. Whenever a language is lost, a whole way of describing the world is lost, and another thread connecting is too our past is cut.