The individual models are completly fine, and for a warband this is perfectly acceptable. The sculpts are pretty, they have personality.
The issue for FS isn't so much with any individual model, as much as it is with the fact that everything is a naked angry dwarf with a mohawk, and thus everything looks similar.
The fact that one of the models in this warband stands out specificly because he doesn't have a mohawk speaks volumes about how similar FS models are.
And yeah, the warband is definitly much better than the average FS unit in terms of personality and uniqueness. But it's still just the bare minimum.
Take the female models, sure it's great that they've added them and it's better than nothing, but when it comes down to it the main difference with the other models is that they don't have a beard. It's not exactly groundbreaking, and from a distance you're barely going to be able to tell them apart.