I think engine exhaust should be much longer. Because in real life they can be as long as the rocket itself. It will look much better.
edit: Great work on the new beta exhaust flame, but you should be able to change the length of the engine flame because if you use 7 small engines instead of one big it looks a bit weird.
yeah even still ages on this needs work flames looking double the sise of the rocket realistic, flames looking a quarter the sise of the rocket nope.