Having been down to these various points, if you haven't been there you don't really realise the unique geography.
Bere Alston is quite a significant town, but its only reasonable road link is northwards to Tavistock. To Plymouth needs a string of narrow lanes, which only somewhat cut off the long way round. Bere Ferrers, next station south, is even worse as a dead end which only faces northwards, despite some parts of it being able to see the Royal Albert Bridge upper girders in the far distance. The two stations over the bridge in Cornwall likewise are pretty inaccessible from Plymouth.
There may be bus services to these places but I've never seen any evidence of one when there, and a bus just wouldn't fit on those lanes towards Plymouth, which have width restrictions.
Bere Alston station still has the three former platforms, only the old down one has track, the up island however is still perfectly intact, with buildings, the old signalbox, telegraph poles etc not only all in place but seemingly painted and maintained. As it is probably over 45 years since the current unstaffed halt layout came into being this is probably something of a record for the old Western Region, whose policy in the late 1960s seemed to be to demolish everything unwanted to ground level.