I am not going to get much into this one, because you already think the game is pretty much perfect as it is, so there really isn't much I can say to convince you otherwise.
I will say that when you promise something as "big" as Path of the Titans because it is supposed to supplant the "normal" new talents you get with an expansion, then if you just cut it out and don't replace it with anything then people are going to wonder what is going on.
And to answer your question ahead of time: No, medium glyphs are nothing close to what they promised with Path of the Titans.