If they actually do move Syndergaard to the Padres, they wouldn't necessarily need to. Rather than complicating the deal with the Ms even further in an attempt to get Mallex included (which would have been even more stupid on Dipoto's part), the whispered Syndergaard deal with San Diego might suddenly make sense if the Mutts are still trying to compete now. Rather than moving Bruce to 1B and putting Mallex in CF, they get their CF from San Diego in Margot, along with Hedges and a ready 55 FV SP prospect in Paddack, hope to get by with Smith at 1B (or maybe even add a fairly cheap stopgap there like Matt Adams, Duda, etc. until they call Alonso up), sign another SP and RP in the second-tier to be Diaz' setup guy and use McNeil as their super-sub...
CF- Margot, RF- Nimmo, 2B- Cano, 3B- Frazier, LF- Conforto, C- Hedges, 1B- Smith (Adams/Duda/etc. until they call up Alonso), SS- Rosario
Plawecki, McNeil, Lagares, ??? (with Cespedes back around midseason)
deGrom, Corbin/Keuchel/Happ, Wheeler, Matz, Paddack/Vargas
Diaz, FA RP, Lugo, Gsellman, etc.
Would be pretty crowded in the OF if/when Cespedes gets back, but that's not a terrible problem to have.