Pad wear pattern could be a tad better, more even across the width of the pad. Fully serviceable though.
Picking up debris is a fairly current occurrence, any time your brakes change noise you should inspect the pads at the next opportunity and clean them out. Pry out identifiable bits with whatever pointy tool you have available, and run a file or some sandpaper over the pad to clear away smaller particles.
The depth of the gouge mark is hard to tell, but is unlikely to be catastrophic.