The new season has been announced today:

http://www.metoperafamily.org/metopera/news/press/detail.aspx?id=6986

and it's of special interest because Miah will make her debut there,
singing Gretel
(December 14, 17, 19, 21 mat, 24, 28 mat, 30 mat, January 2 mat)

and Sophie
There will be performances October 13, 16, 19, 22, January 1, 6, 9
mat, 15 but she is sharing with Christine Schäfer

She will be in good company, as one is entitled to expect from MET

James Levine will conduct Strauss's Der Rosenkavalier, featuring the
much-admired portrayals of Renée Fleming as the Marschallin and Susan
Graham as Octavian, with Kristinn Sigmundsson as Baron Ochs. Miah
Persson makes her debut as Sophie, a role she shares with Christine
Schäfer. Ramón Vargas and Eric Cutler alternate as the Italian singer,
and Hans-Joachim Ketelsen and Thomas Allen sing Faninal.

The Met's special holiday presentations for families enter their
fourth season with Richard Jones's English-language production of
Humperdinck's Hansel and Gretel. Miah Persson and Angelika
Kirchschlager are the lost siblings. Philip Langridge reprises his
portrayal of the Witch and Andrew Davis conducts. Jones's production
is a fanciful version of the familiar fairy tale that delighted
children and adults alike when it premiered at the Met in 2007. The
eight performances include four matinees and are specially priced for
the holidays.

Per