When I have a position is unclear to me, or when I often make a mistake against it, I put it on the ‘To Study’ list. Afterwards I share these positions with someone else to ask more information. Currently I take a screenshot, or type the sequence of moves in an email.
Therefore, for me, it would be very useful to have an export function for a single position in the repertoire and being able to email that position (in PGN, perhaps also with a screenshot of the board) directly from the app. Including the PGN is important because when I get an answer to my email, I need to be able to find the position back in the repertoire to add the comments and/or key moves.
David