Hi Flap,
We acknowledge that TG2 isn't as easy to use as TG v0.9. Initially this particular incarnation of TG2 was intended more for higher end users, but we should have made things a bit simpler from the start. Hindsight is 20/20. We do want to improve this in the future.
There are some big differences between TG v0.9 and TG2. v0.9 uses a heightfield of a fixed size which makes a lot of things easy. TG2 is based on a whole planet and it also has powerful displacement capabilities which make things a lot of things more difficult.
An example of this is the start and and elevation sliders. That's easy to do in v0.9 because we know the lowest and highest points in the terrain. In TG2 we're dealing with a much larger area and the displacement capabilities also make it much harder to figure out the lowest and highest points of the terrain.
You have a good point about the slope. At the moment TG2's system for making the settings windows doesn't allow for graphical previews. It should have already, but it doesn't. After the final release this is one of the things we'll be working on, so we'll be able to put graphical previews in settings windows and add back some of those things like slope previews.
There are a couple of ways which let you do some of the same things as in v0.9. For positioning the camera you can use one of the other 3D Preview views to click on the camera object and reposition it. The other views are accessible from the second button from the left under the 3D Preview. Click it to change to a top down view for example, which is like the old previews in v0.9. You may need to zoom out until you can see the camera object. You can't currently rotate the camera though, just shift it's position.
TG2 does have some navigation controls which might make things easier for you. These move the camera in the 3D Previews. There is information about the navigation controls
here.
You can find the slope and elevation of a point in the terrain by mousing over it in the 3D Preview. The information about the object under the mouse is shown at the bottom of the 3D Preview and you can also open the 3D Preview Location window from the View menu. Lets say you want to set the maximum elevation of a shader. Find a point on the terrain which is as high as you want the shader to go. Move the mouse over it and note the Y coordinate in the text under the 3D Preview. Put this value in the maximum elevation setting for the shader.
Regards,
Jo