I don't think it necessarily counts as a departure until it's announced. It is only a limited run, after all, and Claudette is the type of character who can dip in and out of Walford. However I think it would be the correct decision for her to leave permanently. It doesn't sit right with me that she admitted to cold-blooded murder, and reveled in taunting her son over it, and is now involved in some kind of salsa romcom alternative universe with Patrick, another person who saw how evil she was but who hasn't acknowledged that since his role in burying her.
Basically, even though I have a soft spot for Ellen Thomas, I think Claudette's character sums up a lot of what went wrong with DTC's era. It's such a shame that they didn't just bring her in as a foster mum with a bit of an edge, and not a murderer.