Thank you Michael - that's educated me on the matter!

Because I moved away from FH in the late 90s, I only knew the LB, CX and Brighton services so all of the destinations and connections offered by the Overground are new to me, except for very occasional use.

So, although my question wasn't a good one, it looks like FH is better off from a general commuting perspective now than it was - and it'll be even better, which is great.