RST

I've used headliner for velcro boards for my son who has special needs and uses velcro backed symbols for communication. I don't think it would work all that well for sticking fabric blocks up without pins. I do think it would be nice in that not a lot of thread or lint would stick either. If you want to use pins and want a very sleek look with fewer seams, I think headliner might be a nice choice.

I should clarify that I've not personally tried using headliner fabric for a design wall, and it might work well. It's just my experience using it in another application that suggests to me that you'd want to use pins to secure blocks. Since I like information shared from a place of actual experiment and trial rather than suppositions, it's only fair that I apply that same standard to myself ; )