The concern is that changing that making OGL 1.0a unauthorized (has this already happened to 1.0?) has the effect banning further use of it with new works derived from works originally licensed under it or OGL 1.0 under the terms of ant OGL version (this relies on the any authorized version clause being seen as restrictive, not permissive.)
Its theoretically fixable for non-WotC dependent content, if everyone upstream relicenses under different terms starting from the root, but that's not going to help where creators are out of touch or license compatibility led to WotC content cross pollinating.
The concern is that changing that making OGL 1.0a unauthorized (has this already happened to 1.0?) has the effect banning further use of it with new works derived from works originally licensed under it or OGL 1.0 under the terms of ant OGL version (this relies on the any authorized version clause being seen as restrictive, not permissive.)
Its theoretically fixable for non-WotC dependent content, if everyone upstream relicenses under different terms starting from the root, but that's not going to help where creators are out of touch or license compatibility led to WotC content cross pollinating.