Default libraries: GPL licencing vs proprietary designs

Even with KiCad now being under GPLv3. businesses are still concerned.

GPLv3 has the statement: “The output from running a covered work is covered by this License only if the output, given its content, constitutes a covered work.

This statement leaves open “what constitutes a covered work?”

While my employer is not “allergic” to GPL licensed tools, it is concerned by the lack of an explicit statement by the KiCad project that “Designs produced using KiCad are the property of the user (or user’s employer) and not the KiCad project nor its sponsors.”

Pointing out that other businesses use KiCad did not reduce their concerns, In particular, they are concerned that SoftPLC, as a sponsor of KiCad, could claim property rights over any/all designs produced by KiCad.

What would be the best way to ask that such a statement be added to KiCad’s terms and conditions?