[...] What made it work was Angela Lansbury's talent and charisma [...]
Bingo. Even though the show required Angela Lansbury to utilise perhaps 2% (at most) of her extraordinary talent, it was that talent that made the show work. It's somewhat depressing that M,SW
is what most people will remember Ms Lansbury for.
To each their own and all, but I won't be watching any remake, regardless of who's involved.