They likely can't acquire a David Price type of arm at the deadline or another top player given the state of their farm system. There will be competition for any top arm or player available at the deadline. Would be tough as it stands now, but yes a lot could change during the season especially if some guys in the minors get off to solid starts and build up some value.
Jays need to add some elite pieces now, not in July. Best way would be to spend as much money as Rogers allows this offseason and then hopefully use whatever assets they have at the July Trade Deadline to patch up any holes on the roster or for upgrades.