Weight does seem a bit on the high side, but if your going brushless, just throw more power on it
I've got 4 flights on mine so far, and it will literally fly around under 1/4 throttle at just over a walking pace (but much lower than a jog). Long down-lines w/ the power pulled to idle (and no ESC braking) it doesn't pick up much speed. rolls are fairly axial, knife edge requires very little rudder. inverted just a touch of down elevator. slow 1 roll Rolling circles can get interesting though. If you feed to much rudder into it, it will actually counter-act the ailerons and stop rolling and just start going into a knife-edge loop, so you have to be very smooth and precise with the rudder. I've got mine balanced about 1/3 of the way back on the upper wing and it seems about perfect, as their is no knife edge coupling in this position.
If you are using 2mm depron for the fuselage, i would recommend adding another layer around the motor mounting area, or some very lightweight fiberglass cloth (1/2oz would do on both sides). This is one thing on mine that i wish i had done, but didn't think it was necessary, but have found out it is (the 6th doesn't like tree's).
Also use some extremely small carbon tubing and run "V" bracing down the bottom of the fuselage from the tail all the way to the nose. The weight gain was only 3-4g on my model using .050" carbon rod and it is much stronger. For the wings, i suggest doing an "X" brace w/ .050" carbon rod as well. The aft brace should go thru the outboard upper wing, the hover flap area, the lower fuselage and then into the lower wing. Then the forward one should go thru the outboard lower wing, upper fuselage, inboard upper wing.