There are few things in the PCB design that I might want to change. The live and neutral are precariously close to each other near where live connects to transformer. Also the mounting screw is very close to mains voltage. Maybe I'm just paranoid about mains voltage, but I'd increase the clearances, considering that there is plenty of board space. While we are changing the board, I'd also bump the trace widths on the low-voltage side, although I don't believe that being really a problem now.

Then comes the parts I know less of. Would it make sense to add some filtering to clean the power? I'd imagine it works perfectly fine without, but maybe to improve audio/video quality? Also the fuse is on the "neutral" side, is that good? Although the plugs around here are unpolarized anyways, so the distinction can't be very significant.