For every person that's said the neopronouns in TCOE (for just one character!) are confusing, there's another person who said how happy they made them. I'm delighted to write for the second group, and if the first group find their next neopronoun encounter slightly less confusing, all the better.
Every time I see someone say "the pronouns have just become a gimmick" I look over at the folks who say they love the pronouns and it makes their heart happy and start trying to figure out how to put even more pronouns in the next book.