I guess it's way too much to hope that the quality of their sing-off performances would be factored in
Amelia in a heartbeat for me, but if the sing-off weren't a consideration I would at least hope the decision would be based on what each performer has to offer the rest of the series, and on their prospects as recording artist, rather than on who's been there all along or who is perceived to want it more. Amelia's not been brought back to be treated as a second-class contestant.