If you look back at core Stormblood, Lyse's whole shtick was magical savior of a long occupation by Garlemond that was almost completely unearned. "Hey kid, you got spunk. even though I've only known you for like a couple days, you get to lead the whole resistance movement!". She never felt like she had any meaningful character development beyond really superficial stuff. I think where Stormblood handled things slightly better is Lyse, while she did hog a lot of scenes, didn't overpower everything to the extent Wuk did. This infographic for Stormblood shows some more context:
Lyse had top lines, but she isn't wildly above everyone else relatively speaking in the top 4 - there are only a few percentage points of difference. But compare Dawntrail
Look at the top 4 here - Wuk literally has more total share of lines in the expansion than the next 3 combined. The last time there was anything close to that much of an imbalance was Heavensward, but storywise that favored Alphinaud because literally all the Scions are MIA for most of the damn thing, interaction with other characters shuffles, and Tatauru hangs out in a bar.
I think what they are trying to do is introduce new characters (Wuk, Zero, etc) to act as replacements for the Scions, but they try too much. Either because the character is an OC "self-insert" or a pet character or whatever, but then they don't know how to organically introduce them without trying to shove them. G'raha Tia is Ishikawa's pet character, but she is able to write him well so people don't mind. I didn't mind Zero that much, although I don't think they knew how to handle her outside her "how do I be a human? what are emotions?" trope and she became less interesting as the post-EW patches wore on. Wuk was basically a furry Luffy that was less endearing and annoying as written.