-2 to 2 stops on flash compensation is not manual flash control, at least in my opinion since 2 stops is only 1/4 power. Yes you can use TTL mode on the YS03 and it will work some of the time. The reason that I would like to have manual control (I too use the strobes on manual even though the camera is doing TTL) is that after a few shots at full power the strobe recycle time on the camera gets long, presumably because of heat concerns.
I don't think any camera that can set an S value in A mode, that's why there is manual mode on the camera.
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