I'd much rather see them add stuns and bar spells, and improve debuffs as a whole, than try to see them wedge protect and shell into the "strategic buff" category. Especially considering how little an impact they seem to have.

It wouldn't even need to be half an hour though... increasing the duration to 10 minutes for cons and 5-6 minutes for thaums would be an improvement... But at the same time I'd like a quantifiable difference in their effects.