I wish the O's had done more this offseason, but if I remain cautiously optimistic about the coming season.
Roberts has been hot this ST. If (BIG if) he can stay healthy and hit leadoff - I'd say 100 games at 2B, 30 games at DH and plenty of time off - that could be as good as a big signing. 2B has been a black hole for them the past couple seasons. Full seasons from McLouth, Reimold, Markakis and Machado should breed significant improvements as well.
If nothing else, the O's have one of the deepest teams in baseball. They could field practically an entire AAA team of guys with decent ML experience right now. With 13 potential starting pitching candidates - Hammel, Chen, Gonzalez, Tillman, Matusz, Arrieta, Britton, McFarland, Hunter, Wada, Johnson and (less likely) Bundy and Gausman - I'd be very surprised if Duquette doesn't pull off some kind of trade before ST ends.