This was interesting reading, as I had the 334s here at one point and now am borrowing the 1plus2s. I've had the same feeling where I've wanted to turn the volume up to get more intensity and that possibly the mids should be a bit more forward. That might narrow the (perceived) soundstage though. The 334s were too V-shaped for me.
Very different beasts the 1Plus2 and the 334 I reckon. I'm not sure I'm into the sound signature of the 334s. I would have been if this was about 5 - 10 years ago, but I find the flavour a little too bassy (slower decay and more diffused bass) now. It just doesn't work for me with particular genres.