They have also talked about possibly having Alonso give 3B a shot off season to see if that may be an option and have Smith at 1B.I'm not a Mets fan, but follow them a lot since I live in the area. I would not mess with any of the young core players at the trade deadline this year unless someone blows you away with an offer. I would see what you can get from guys like Vargas, Wheeler (tough now that he is on the IL) and Frazier, etc.
I know Dom Smith is blocked to a certain extent, but keep trying to develop him in LF and see what you have. The homegrown core is pretty solid so far: Alonso, McNeil, Conforto, Smith, Rosario.
Weird that I still here some announcers talk about Smith’s lack of power. Over a full season he would be on a 30-35 HR pace..,