Brakes are a bit rubbish.

[Rippthrough]

Wheres Ripp these days?

Got a shitload of family health problems on at the minute, 's why I haven't been around much, can't remember the last time I actually made any shiny bits...

Anyway, yes, they can glaze over a little if they see a lot of light use, usually a spanking/rebedding session sorts it because it re-establishes the transfer film on the disc for the pad to bond to, but it shouldn't be to the point where the brakes are that bad, they usually just loose a little bit of initial bite and have the odd squeal when they need doing.
Outright power loss or lack of bite might be down to sticky sliders or similar with the pads knocking back slightly, give them a good clean and re-grease, same for the contact areas on the pads.