I can only assume both characters were always meant to be short-term as the actors have worked a lot elsewhere, and that's what the actors wanted to sign up for. I still think that Tom was originally meant to be a much uglier character until the actors who played Prince and Tess quit and the show also knew that the Rico story was a bust with viewers.
Now we have Jack with his brother's killer, which is just more misery. They never seem to want to let some of these characters develop.
I'm in early December, the conclusion of the story with Vivian, Liam and Chris. The whole thing was very well-acted (especially Chris' fears he had Parkinson's), but I have no idea what to say about Liam attempting suicide and then blowing himself up in the space of about three episodes.
The story with Tess is hard to watch, knowing how it ends. Probably one of the most depressing stories I can remember on a soap - an abuser murdering his partner and her daughter on said daughter's wedding day. It's well-acted, but I do wonder if this was the way to go.
I find Jojo to be so unpleasant...and with Desi back, doing the same old things (how many times do we need to see her carrying about her wedding?), it's a stereo of entitled child-women.