I'm not directly familiar with this particular airplane but on most all profile models the wing centerline needs to be no lower than about 1/2" below the thrust line.  If any more than that it will end up "top heavy" and want to roll outward in regular upright flight.  This is because the engine is horizontal on the thrust line as well as the tank and fuel load.  To improve scale-like appearance the designer may have made the wing lower but yes,  the tips need to be raised so that the leadouts exit more near that thrust line from the side view.  Dihedral will have no effect on aerobatic flying ability.  On full fuselage airplanes you can get away with as much as an inch offset usually because the engine will normally be inverted so that the bulk of the engine,  muffler and tank is below the thrust line-more in line with the wing centerline.


Dave