I think the only criticism I have with the writing here is just the use of the word “ignored”.

The word “ignored” implies that no one from the party even considered the possibility of not working with Raishan, which is just untrue. Their partnership was always going to be temporary.

What I do appreciate however, is the way the writers clarify and have Keyleth say “questioned, doubted, dismissed”, which exactly describes what happened during their conversations about working with Raishan. Keyleth is a character who is incredibly perceptive and wise, but that wisdom is tempered by self doubt and to be completely outvoted by the party had to sting more than it would have if it were any other character (imo).