The Acura and Honda AWD systems are definitely a step above the Mazda system. Having driven my mom's CX-5 turbo you can definitely feel the torque steer if you floor it. At the end of the day, it is a more than adequate system with the right tires, and most consumers are not going to be pushing these things hard on the street.
Just curious if set on the Mazda, have you thought about a CX-5 Signature? Yes, the platform is older but I like the fact that it is made in Japan. The CX-50 might not be quite as well polished or put together coming out of a brand new plant in Alabama...