If Google cared about Google Finance, they would have done that five years ago (or more). It’s clearly in maintenance mode, with the bare minimum spent on it to keep the lights on but no active development.
Which is potentially why I've heard for years that Yahoo Finance is really good, in fact probably better considering the amount of attention Yahoo Finance gets. Yahoo is still my go to choice. I only use Google when I am looking up stuff from Google's domain and it shows up as an instant answer.