You're right, theres so much new things in cataclysm that BC and WotLK look like minor content patches in comparison, its no where near, its mile ahead. If a grindy glyph system was the major selling point of the exapnsino for you then yeah, it looks bad, but to me this expansion looks awesome.
We're hardly losing anything they announced, the ability to choose guild talents and a flawed system that would act as another gs.
How would PotT work? It was supposed to be a choice, with many different options so your guy could be unique. It would just boil down to another best thing per class with most options unused. To make nothing be OP most things would be crap. Pretty pointless