The only way that Niantic will change item drop rates and almost anything on the game is if there is a drop on sales, what is the point of increasing TM's if people is still buying premium passes like crazy? I stopped buying them a week ago once the drop rate went that low and the catch rate too, I hope more players are doing it and we make them change drop rates.
The same with eggs, if you don't like the joke of Chinchou being a 10k, don't buy incubators. That is the only feedback they will listen.