Matthew Stafford still played great last year with out Megatron but his touchdowns and completion went down from his 2015 seasons.Every quarterback has a blanket and it's not like Stafford reached a new level of quarterback play after Calvin Johnson retired atleast according to stats . I doubt The Ravens aren't going to sign a veteran receiver and if they do or don't Joe Flacco will simply just have to find another blanket to throw to . The last time he didn't have a security blanket was in 2013 and it didn't work out well for him which motivated The Ravens to sign Steve Smith Sr in the first place.The only way Flacco get's better is if he actually does something similar to what Matt Ryan did during the offseason in 2016 which is probably hiring a good quarterback coach to work on his mechanics, working with his receivers, and working hard to get on the same page with Marty M so by the time training camp gets started he'll be comfortable within the offense.