So, hm, I am using GS ince the first A4 version. I always used Extra-edition. So I can't tell anything about shaders. But I have to say, that I was very disappointed from the upgrade to A7. First I was happy and said, juhu I can import meshes and compile shadows with them. But I saw the results and my eyes became seriously ill. Ok, for an absolute hobbyist the extra A7 engine is enough, because I have nothing to do with gamedevenloppment except in my freetime. But I thought since A7 came out, to change to another engine like Torque, because they brought a ready to use product. A7 is not a complete product. Every opensource programm is more complete than A7. I don't like products which features are updated on a such slow time.
