Ultimately whatever you think of the value and contribution of Sander's time with us, would we have gone back up last season without him? I doubt it because he scored and assisted several crucial goals.
So in that respect, same with McBurnie, he's paid his transfer fee. It will be interesting to see if a PL club or top league European club comes in for him this summer if Burnley are relegated.
He never seemed settled with us once we were relegated but at the same time played largely well in the championship. I don't know how he's done at Burnley but he plays for them every week.
Also please go not boo him on Saturday. Whether you agree with him leaving to Burnley or not, it will only spur him to prove a point than if we just give him a polite clap. Personally I don't think he deserves boos regardless.