Haven't been into anime in over half a decade but FLCL was a huge show for me when I watched it as it aired on AS. I was at the perfect age (13) to really connect with the show and its themes of coming of age. Not sure how much impact it would have now that I'm 25, but then again these new seasons could easily be something quite different from the original.
I'll definitely give this a try, and I imagine so will many others like me who grew up watching adult swim but are no longer into anime. Smart move by AS