When I first saw the news I thought it was just recovering old ground, but upon reflection, this could be a great plot for Jessie.
Jessie is a superior actress to the guy who plays Tamwar, and the writing/ storytelling has come on ten-fold since that storyline. There was no aftermath, whereas if there's one thing DTC does well (as seen with the Lucy aftermath and Carol's cancer) is that DTC has a way of capturing the human emotion in these big tragedies and really tugging at the heart strings.
It's great to see a storyline for Kat that doesn't involve sex or babies. Everything she has done since her return has pretty much fallen into these two categories. Jessie has always excelled but I'm looking forward to her giving a performance that isn't the same rehashed material from the past 4 years.