Maybe he's referring to the fact that some of the mods are "Finished" and "working under 6.4.". I suppose that's a result of taking a mod that was "Finished" and "working under 6.3", and updating it to work under 6.4. Should the status be changed back to "Beta"?
True. The "beta/finished" status is subjective anyway, and isn't necessarily a good indicator of the mod's reliability. Someone installing mods on a 6.4 beta should probably have a proficiency level of at least 4.