I suppose we agree to disagree.
I understand that Core Battalions started as the same ground for everyone, but that was fake. Some armies don't have Behemots or Artillery, so it was flawed since the begining.
Unique Core Battalions will not be equally good for everyone, that's something that I expect, but that's in another league of the main problem from Warscroll Battalions: organization chart was really important but a reward like [+1CP/+1Artefact/1-drop/+powerful ability] was a big deal too.
With Core Battalions, we have the same rewards for "everyone" (not true, but you get the point), that's a big step forward.
With Unique Core Battalions we still have the same rewards but it seems that you will not need any allies. And that's another step forward in my book. Not perfect, but good enough for me.
About abilities from GHB21, I don't have a problem if they are not printed as rewards from Unique Core Battalions. Don't get me wrong, you can complain as much as you want, I'm just poiting out that it did not happen yet.