I have just ordered 200mbit and thought I would take a look at my power levels and stuff before they change me over. Something weird is definitely going on, one of my qam64 upstreams has dropped to 32 and all my downstream post rs errors (of which I should have none) are in the negative.
Incidentally, as I have seen quite a few posts where speed increases have turned into decreases I thought I would get a reference point for that as well. Tbh I am not expecting any problems, my connection has always been top notch.