A lot of the comments I've seen about the problems with Caps and a few others (don't remember the Giles in particular) has to do with the often radically tapered wing planform and generally high (by aerobatic standards) wing loadings. When it comes to kits, and to some extent plans, quite often the final wing loading is built in regardless of the quality or care of the builder.
But then that's what hole saws were invented for...