That's fine with me if you're not terribly fond of that stuff, but does it really make the album less representative? That era probably takes up less of the box set than it does of his actual complete studio discography.
I think they got continuously better in their pre-Catch a Fire era. I really have to be in the mood for the earliest stuff with alot of horns because it's so poorly recorded, it sounds like they only had one mike. But by I think by 1967 at latest they were doing alot of great stuff.
This was my real introduction to Bob Marley:
I liked it then, but I admit that when I first heard the Island/Tuff Gong albums I liked them even more. Now I prefer these versions a good chunk of the time, although not always. The Scratch version of Concrete Jungle is one of his greatest tracks, IMHO, I'd take it over the Fire version.