I'll take this design over the earlier Collins AHRS, which only used pitot-static inputs to help stabilize the AHRS attitude. There have been more than one event of pitot icing on CRJs leading to significant errors in the attitude outputs from the AHRS, and loss of all air data output to PFDs. Having the L PFD, R PFD and the standby all showing significantly different attitudes, with no valid airspeed info and altitude info displayed only on the standby is not a great situation to deal with.