Unwrap and texture settings

Hi!
I have some problems understanding how the unwrap and texture settings work, or at least I think:) Doing a larger cliff area but the textures looks blurry and not very detailed so I think if I might have some settings wrong.

So in the Unwrap Tool is it just as simple as continue adding Maximal Texture Counts to get to as close as possible to 100% in Texels detail etc and hope it makes enough textures to get me to more detail? In my model on the screenshot has 5 texture for now.

The Default unwrap parameters are they overwritten by the settings you made in the Unwrap Tool?

Anything I should do differently?