So the maintenance ended (returned to "Good Service" on the status page), but I'm still getting drop-outs. I've been monitoring my connection for a few days now and there is definitely a pattern. You can see it here:
Rinse and repeat.
It's always the waking morning hours and peak time evening hours. Between those peak times, the connection is as smooth and as dependable as I would expect.
I assume that this points directly towards it being an issue with high load on in the region/area. In which case, surely their maintenance should have fixed it?