Iirc boney heavily hinted that the true potential of windherding wasn't unlocked yet and that a better working model would show us new avenues of enchantment.
Sure, but how many people read much remember that one GM post? For that matter how many people just want to 'enchant' in general. The last full on enchanting action we had was the robes... which also did not go so good, they are good enough that no one wants to change them but not so good as to inspire new projects unless we need it for something like the towers... which we can unload on elven mages anyway.