The information is not vague. The entire article was posted, every page...revealing details of systems, etc.
Yes but this same article also detailed how the usual mmo classes were spiced up by having complementary effects such as a warrior spinning in a mage's fire spell to create some sort of whirling dervish.
Even if the game is based on known mechanics, this is not neccesarily a bad thing.
They can take all the tried and tested bits of those and add new flavours.
That may be overly optimistic but the point is that you are being overly pessimistic.
At this junction we really do not have enough knowledge to objectively judge one way or another and just like with Skyrim we will not be able to until about one month after release.
What we can do in the meantime is petition the little bits.
Like urge them to stay true to lore.
Imga in Summurset and all that.