@Altix
I think it would be great if you posted your findings in both German and English. I'm interested in doing FPV with one of my M4s. So I think I'd get a lot from the English version. You are right, there is a learning curve with AutoQuad. I can attest to this with my recent posts. I'm not sure if it's AQ or just this hobby in general. Unless you are buying RTF then there is a learning curve. Even with RTF there is a learning curve. You have to learn how to fly the craft too and not crash it too often.
It is my opinion that the people looking to learn or looking for a challenge will be attracted to AQ. A few months back I decided to finally get into this hobby after first learning about it in 2012. I read an article online the mentioned 3D Robotics and DIY Drones. I went to DIY Drones website, but didn't follow through because of other hobbies. I have been into DIY audio for a few years, building headphone amplifiers and digital-to-analog converters for my headphone hobby (addiction). So I knew I'd eventually end up here or something like it. I started looking at nano sized quads that had a DIY element to them. I first found CrazyFlie, but soon realized that the platform wasn't for me. I didn't like that the only way to control the craft was via iOS or joypad via a computer (joypad is better than iOS at least). I wanted something that was more traditional I then found the M4 and haven't looked back. I like that it's small, but powerful and is modular. Even with my recent issues I'm glad I chose AQ.