My rule of thumb is that any brace you can't taper to nothing at the end needs to be inletted. And the taper better be pretty long, too. There's enough downward force on the upper ends of the X braces that I would strongly advise not taking those to nothing at the ends, so they certainly need to be inletted, as does the upper transverse brace. After that it gets more optional.
There are different ways of doing the soundhole braces. I make them a bit bigger than usual (say, 5/16" square), inlet them into the upper arms of the X braces, and take them through the upper transverse brace to inlet into the neck block. This 'A' brace is a lot more effective, IMO, than the 'popsickle stick' in keeping the neck from shifting inward if (when) the guitar gets dropped.
Mario will tell you that the bridge patch _must_ butt tightly against the arms of the X brace, or you will lose sound. I've never noticed a problem that way, but hey, who am I to argue with Mario?
Some people do inlet the bridge patch into the X braces slightly. It might help some to keep it from peeling up, but then, if it ever does, or it cracks, it makes the repair a whole lot harder. Pity the poor repair person. If you do the patch right, and use a right piece of wood, it should wear out long before it peels or cracks, and that can be fixed without removing the patch.