I have read all of this thread and I'm still not satisfied with the answers given.
I was also not aware of the above mentioned fact that by enabling iCloud the option to remove the pictures from the iPhone after they have been transferred was not available.
Recently I came back from a trip and decided to transfer ALL the photos off my iPhone and I too was looking for this option. So after the transfer was complete and I could not see any other way I went into the phone and started deleting ALL the pictures manually to make space on the phone.
I had to do this manually and since I have 128G memory and a lot of pictures it took a long time.
Finally I managed to get them all deleted and went on with my life.
The next day when I went into my MACBOOK to look at the pictures they were also GONE ALL of the pictures I had deleted from the iPhone were also deleted from the MAC!!!!
As mentioned they were luckily still in the recently deleted folder, BUT THIS IS INSANE!
How can I managed the pictures on multiple devices using iCloud if it either keeps putting them back or deleting them from every device????
Sorry but I have never had so much trouble from any photo management software as I have had with iCloud and it's interaction between accounts and devices??
I repeat this is an insane system.