I find points in both Cleretic's and Lilimo's perspectives to right rather true. Erenville calls Cahciua his mentor even before DT and seems to hold her in at least some respect, but in DT mostly seems to regard her and her flighty-ness with quite a bit of disdain. As for Lilimo's comment on "abuse," I believe that was more because Cahciua does not show Erenville the slightest bit of respect. That sort of constant needling is indeed a form of emotional abuse, which Lilimo did a good contrast with Y'shtola and Matoya's relationship, where the needling is mutual and thus demonstrates a mutual respect. At the same time, Cleretic makes a good point about it being more a parent who never really got the time to be a parent unable to come to grips with the fact that her child isn't a child anymore, and their personalities being too different to really understand each other.
Getting back to the original post, I think Catwho makes a really good point about introducing new characters. Forcing them directly into the spotlight (Wuk Lamat) come across as hamfisted and doesn't give time for the fans to adjust and develop an affection towards the character. Estinien, for example, was arguably a major protagonist in HW, but he had been introduced in ARR during the Dragoon line and during HW, the spotlight swung around so he was never jammed in your face the entire time. Then he went off to do his own thing for a while, so he didn't overstay his welcome. Now, he's quite beloved by the fanbase. G'raha was basically forgotten after the ARR raid series till his return in ShB, and even when he did return, he was supporting you the whole time. Wuk Lamat wasn't an awful character, she was just jammed into the forefront almost immediately, and the spotlight was constantly on her, so people very quickly got sick of her. She felt like, as others have stated, a Mary Sue self-insert character after a very short time. She just...wasn't given the time to cook out of the spotlight that others were.