Developer lack of communication

[Dyvid]

If they are showing something, no matter how many disclaimers they add to it, it has to be somewhat representative of the final product. Otherwise their credibility comes into question.
They kept pointing out that the potencies were not final, but the mechanics were supposedly representative. If this was not the case then every skill that was shown for every class might as well not even be there 2 weeks from now. After all "it's not the final version".

They did this so they could show of the basic design and play style to get community feedback, White Mage, before the actually product is launched.

Here is something to think about. DRK in 3.0 Darkside was shown in the job action video but change right before launch. Nothing is set in stone.