Yes but we wouldn't let Munir on loan and they wouldn't pay 15M or whatever we wanted for a backup striker. Willian Jose will surely stay a starter.
Also think Sandro is a better fit in a 4-2-3-1 as the only (backup) striker if that's how Sociedad will use him. It would be a waste to play him on the wings (like Montella did last season in Sevilla) though they lack some depth after Oyarzabal and Januzaj there as well but they apparently plan to bring another winger before the end of the transfer window.
Munir is better suited for a 4-4-2 with a stronger striker (Guidetti in Alaves last season) alongside him.