I'm sorry to hear that Heather is leaving - I thought she did a good job. I also have to admit that her character never did develop into anything. I thought that maybe it would go somewhere with Kelly & Hugh, but it doesn't look like that will happen either.
I wonder about the writers - Dan is leaving because of poor focus group results - however, his story line tanked. Now Heather is leaving, whose role wasn't developed.
I don't know how it works, but perhaps the performers are doing the best with what they've been dealt. Just a thought