I don't think their social game could be much better, it's already extremely good. 
Ultimately it comes down to continuing to win. Regardless of how much community engagement and outreach they do, people respond to winning - look how much coverage they were getting at the tail end of last year.
That sort of hype and success is the only guaranteed way to bring in casuals - just look at the All Blacks, half their fans probably couldn't name more than a handful of players but they still sell out everywhere they go.
	
		
			
		
		
	
				
			Ultimately it comes down to continuing to win. Regardless of how much community engagement and outreach they do, people respond to winning - look how much coverage they were getting at the tail end of last year.
That sort of hype and success is the only guaranteed way to bring in casuals - just look at the All Blacks, half their fans probably couldn't name more than a handful of players but they still sell out everywhere they go.