I have an AVI LSI Integrated that works pretty much the same. It definitely does not lack power, as it can deliver 175 W per channel, if memory serves. I admit it can seem lifeless, if you're not used to the way it works. Also, it never turns shouty, even when you do twist the pot way up (or around), which is another thing that people are not used to.
My current amp/pre amp combo has a similar behavior, but it doesn't have a rotary pot, it scales up in 0.5 dB increments, which is very precise and doesn't leave you guessing. However, there is the same feeling of lack of volume, because the sound is very clean and it takes a bit until you realize the sound pressure is really high.
Coming back to Electrocompaniet, I heard this precise same model, but that was a few years ago. However, I recall that at the time I thought it was a very clean, musical amp. I never paid much attention to the volume setting, though. My guess is you should give it a bit of time, get used to it and the way it works.