It's not a change I'd make, because Mia Kirshner does a great job as Amanda, but I have to point out that the age difference between her and Sonequa Martin-Green seems way too small at face value.  Mia was born in 1975, Sonequa was born in 1985, and it's Mia's performance that makes me totally buy her as Amanda.  I wouldn't have been able to suspend my disbelief if she wasn't such a good actor.
	
		
			
		
		
	
				
			
				
 I was just trying to make a point - which is addressed by your next comment: