Other games have had countless iterations of their talent tree and has worked with lots of feedback. Post ShB FFXIV scorched earth'ed the job design so it is going to take a long long time before a good talent system can be cultivated from the ground up.

It will be especially bad if they don't do any kind of pre-exposure of what they are thinking of doing in this expansion. They have a habit of keeping new features tightly under wraps until near the day of release which has its pros and cons but for something like a talent system the con of not getting early feedback is tremendous.