UVs Blender - how can i: auto seam hard 90° edges, unfold uv, orient uv, straighten uv i´m coming from maya and want to make the swtich to blender. i need some help with uv. 

my video explains in detail what i want to do in blender:

https://youtu.be/SKh-La_fW1o

edit: as you wish all with pictures. but watch the video if something is still unclear its only 1 minute. thank you 

1) auto seam, adds seems on all hard 90° angle edges


2) unfold unfold function like in maya




3) orient shell



Still no help, let’s me think Blender can’t do it? Thats sad I wish I can replace maya with Blender I just need to develope my workflow
You can do it with hardops addon.