Hi Dziga, I'll try to answer your questions as best I can.
1: No, this is not available at the moment.
2: We don't have automatic folder creation except for render element sub-folders.
3: We have an SDK, which you can request access to, but it is C++, not Python. We don't have immediate plans to add Python but it's in long-term consideration.
4: This is not possible, however certain settings are exposed for input from other nodes, such as specific cloud and atmosphere inputs to drive e.g. shadow color. There is no general capability for "use everything to drive everything", though the idea has certainly been discussed before.
5: We do have plans to improve the render view this year. Reference this thread for specific 2018 plans, some of which are already available, others of which (e.g. Pathtracing) are coming soon:
https://planetside.co.uk/forums/index.php/topic,24058.0.html- Oshyan