It will ruin the show, in my opinion, to kill her off, but that doesn’t mean these writers might not do it.
And *that* is, I think, the big takeaway. It doesn’t matter what the fans think–it doesn’t mean A and E won’t do it. Killing Emma or writing her off isn’t a smart move either way for a variety of reasons but we aren’t inside A and E’s head in terms of how they think. They might go the super bittersweet route (like with Neal) or they might go the super happy ending route (@Michael’s plan). If they know that S7 is the end and they really want to start over at square zero then I think all bets are off in terms of doing “what makes sense for the fans.” It’s all about what they need to do for S7, should there be one.
Also, one more thought: negotiations are just that…negotiations. They aren’t inked named on a line. And the negotiations could be anything from less screen time and a bigger trailer to credit as ex. producer and 250,000/episode. And if ABC doesn’t want to play ball then both parties can walk away.