You have to feel for Geraldine McEwan, she had some big shoes to fill when stepping in to the role. Joan Hickson is the definitive Miss Marple, with a loyal fanbase even to this day.
While so far McEwan has "made" the recent adaptations of Christie's classic series, the rest of the new series is definitely lacking the fervor of it's predecessor.
The supporting cast hasn't been the best, actually they have been downright lackluster - with very few exceptions like that of Sir Derek Jacobi in The Murder at the Vicarage.
The writing is dull, and overall the show needs a major tweeking.
I still plan on giving this new version a proper chance, but I hope that in the near furture they make some major changes before they lose the fanbase and end up getting axed.