Still, if you look at what they've done in the past couple of years you'd see a lot in trying to revert that situation. Forcing a maximum tick rate of 60hz (was 120), dropping memory use and performance (tick rate goes to 2hz when hidden on a separate tab, or out of the screen); coming up with new browser APIs so the browse can control the plugin performance; and on and on.
They do deprecate a lot over the years. However, is "eliminated" something people really want? The platform prides itself in the fact that SWFs that worked for Flash 2 still work today, despite the changes in the language and virtual machine. So unless it's a change of security policy, nothing breaks or is "eliminated"; as a developer, I find this to be a good thing as I don't have to have a client coming to me after 6 months complaining about something not working anymore.
Flash is a platform that allows people to do a lot. Including shitty binaries. And there's not much defense against it.
And personally I still have my browsers crash more because of shitty HTML/JS than Flash. YMMV.