Nebulous for sure. Just like:

-lay flat seat will satisfy all higher class requirements in this section.

-the unknown costs that will have the new 10% max year over year in medical.

-company jumpseat language from an arbitration now in the main body of the CBA, with new language and definitions.

I could go on, but most who have researched are aware of the vague language that, WITHOUT TRUST, due to past practices, is concerning.