Greetings kevibrr.
I don't recall rocket being to tight and impossible to orbit. Nonetheless, the turn rate is already good as it is if we tweak it again, it might make this rocket, less friendly for newer players and it could become harder to hit as Zonas mentioned.
Advanced is different compared to the normal one. More likely to slow down (curve), due of the speed gain. So the ability to orbit will disappear faster, unless you keep positioning right, to expand the orbiting range between you and the rocket. Besides, this is advanced, so of course, it will be harder. We don't want auto orbiting rockets here.
And I don't think we need orbits to be the main focus. Then everybody will orbit and won't even try to do something else as it won't get them any kills.