Ok, nevermind that the OP described it herself as a declining and deteriorating situation. I know you've been following this thread from the beginning.it wasn’t “evolving” - she used to be the catcher and then she wasn’t. no capiche, but you are free to have your own opinion.
"A little background. DD is a catcher and began at C for about half the games in 9th grade, about 3/4 of the games in 10th grade (our runner-up year) and all games last year", "Starting around 1/4 through the season, HC started playing DD as the DP and letting a freshman catch. Nothing was ever said to DD as to why she was being edged out. Eventually, DD spoke to her and she said, "Oh I didn't know you wanted to catch. OK, I'll get you some time in." After that conversation, she caught two Region Games where there was never going to be an issue of whether we would win or not and that's it." and "the only kid whose role was diminished from starter to benchwarmer over the course of the season."
Not exactly a light switch scenario in my mind, more of an evolving (up & down) situation is how I see it but as you say...you are free to have your own opinion.