The lack of Vision is on those that don't understand that this game is it's core.
If you are building a new MMO, you build a Base Core, perfect it, refine it, then once you feel good about it, you add to it.
Let's say it was released with every single add-on you wanted to start....then, a couple of months down the road they find a glaring flaw and have to change the way something operates, not only do they now have to change the Core, they have to spend even more time adapting the systems that were desinged around that Core to fit the new design. If it was only the "ONE" add-on that was effected, then the work to implement the fix was just doubled, but more times than not, a CORE Change is going to effect more than just one other option and would severly hamper the "fixing" process. When it's time to implement they can devote their full attention to it, making it top priority.
The Core of this game is Solid, and has room for everything you, I , and others want (add-on wise) and can and probably will be implemented, but not until it is time.