Thank you for your submit. Why do you want to delete the _service file? I added it on purpose so that one can execute it locally to update. As it is disabled I don't see a problem with it also for an openSUSE Factory submission. Also, out of interest as I know you have way better experience with packaging than me:

• Why delete the %doc prefix?
• How do you know that these build dependencies are not required? Just experience or did you try it?

I hope I did it correctly by incorporating your changes but also mine. I hope you don't mind the superseeding request. Or you create another SR afterwards.