This is a nice summary.
Compared to the freedoms of millions and billions of uses my 'developer freedom' is pretty far down the list of things that matter. As developers we are servicing people, they are not our lab rats.
If you don't want facebook to track you don't make an account on their website and don't click any of the stupid buttons on their website.
They still build a shadow profile of you from mentions and photos that friends upload.
It also tracks us through its widgets on other sites.
It requires a lot of effort to fully opt out.
Being open and honest with people really doesn't slow down development all that much.
Good!
This is like saying that prescription-drug regulations are limiting speed/freedom. When those things are dangerous to the user, they should be limited!
And I still don't agree that it slows anyone down. Want to launch a new feature quickly? No problem, go ahead and launch it. All you have to do is add an opt-in dialog at the beginning.
As far as freedom goes, we've seen the abuses of that freedom and it's time to limit it.
GDPR doesn't penalize or prevent innovation. It just forces it out into the open.