As for small missions probably, expand upon the super soldier serum Strawberry going back and retrieving different experimental serums across facilities or vaults to test the effects, the usual stuff.
But as a major update maybe going and defending/cleaning up a factory planet where it is produced, maybe getting raiders affected by it, maybe other operatives or agents that went rogue, failed and got corrupted before us. Corruption itself for Strawberry and overall perhaps bad endings. Other users can offer more missions ideas but at it's my suggestions when you have time, I hope everything goes well.