Answer to 1:
X Plane will release it when they feel like it is at its best, MAYBE SOON, It has to be perfect. There isnt a Release date.
2: If you are using A Plane where the Prop is in the front, Its normal. At high G Force Turns its also normal, Its the condensation on the wings. For the last one, Did you press X, Because that is what Exhausts the Engines.