actually, the AoA means little as what counts is the generation of lift. one strong point of the close coupled canard (and reason it has been chosen for the Rafale) is that the canards allow for better control of airflow over the wings, which in turn, allow for more lift for similar AoA without them. That’s why it cn have such a low approach speed despite being a delta, like, say, the mirage 2000

Not really, Cannard will improve CL at the same AoA by creating vortex just like a LERX or chine .But that only help to a certain extent ,aircraft AoA still play very important role.

PAK-FA front LEVCONs and F-35 chines also have the same purpose