Because they became a mess. There are places where they asked specifically for feedback on this particular feature. Did you post there?
For what feature? I think you may be mistaken in your understanding of what this is.
I don’t see the problem. The talent works without Barkskin, Barkskin just makes it better. It’s not like the talent needs Barkskin to work.
And the talent system has been like this for a while so why are you complaining now when this system will be changed in a few months?