About the visual stuff, will review them for the upcoming update, which might take a little longer and won't be just a bug fixing but more of an upgrade in some respect.
About the rolling to the left. A single engine propeller aircraft experiences, as long as the propeller rotates, what the Newton's 3rd law dictates, "for every action is an opposite and equal reaction". That mean as the propeller rotates to the right (from pilot's view point), the fuselage will rotate to the left. On the ground this translates to higher weight pressure on the left tire, so on the roll the left tire experiences higher amounts of friction than the right one (and with the action of other forces), turns the aircraft to the left.
But, on the air, there is no tire friction and the only "stuff" that try to counteract this rotational force is the drag that wings and vertical stab surfaces create when they rotate as reaction of the propeller rotation. You can imagine (and compute if you want) that those forces are not so big to stop any rotation specially at high rpm, and as rotation builds up, the right wind has bigger angle of attack from the left, thus makes the phenomenon stronger. The phenomenon decreases as the rpm go down and the airspeed builds up. At higher airspeed, the vertical stab creates a streamline effect that opposes to a degree any yaw/roll movement, thus makes the aircraft more stable in straight flight.
As long as all the above are happening on the aircraft, it is ok.
As about aileron trimming, since the aircraft does not have such abilities, we don't provide any in the cockpit, but we haven't locked out the ability to use the aileron trim if you like.