I also think having a rescue primer (or equivalent) makes sense. I assume that includes courses like PADI/SSI rescue etc rather than only GUE's primer.
Someone correct me if I'm wrong, but with the previous standards, you could become a tech or cave diver without training in different rescue scenarios, only a controlled diver lift as part of the tech pass criteria (NB I am only a fundies rec pass so if rescue techniques are included in T1 or C1 then happy to edit this).
This way just adds another layer of safety which should be there, but technically might not have been.