They seemed to have done somthing at about 11PM last night.

Now:
Downstream Receive Power Level: -11 dB

Before
Downstream Receive Power Level: -12 dB

7dB - -5dB is the "range", so it got a bit better.

My failure rate has dropped and my office VPN has not died.

My firmware is too old to take advanatage of the diags they point out on that page.
Oh well.