“…the law is clear that a trial judge should not delegate decision-making to an assessor: Behrens v. Stoodley (1999), 1999 CanLII 1626 (ON CA), 128 O.A.C. 58, at para. 40. An assessor’s evidence is but one piece of evidence to consider: Woodhouse v. Woodhouse (1996), 1996 CanLII 902 (ON CA), 29 O.R. (3d) 417 (C.A.), at p. 435.”