Just a little critique; this diagram would be a lot easier to follow if you used ground and V+ labels instead of drawing them explicitly as wires. I've spent a couple of minutes looking at the circuit and I can't even begin to understand it. I'm sure other people with more experience with this sort of thing will be able to decode it, though.
That's a two-edged sword. With the diagram as drawn, at least you can find everything that is connected to ground simply by following the wire. If only ground symbols were used, it would be easy to miss one if you didn't look in the right place. While that may be unlikely with a small diagram and for the ground, for signals on a large multi-sheet diagram it becomes a significant pain and source of error.
In practice the middle way is often best: all subsections in a section of the diagram (e.g. amplifier, filter, driver, etc) have their grounds connected together so that you can see the unit. But separate subsections have separate ground symbols.