In point of fact, the rich text editor is actually easy to use, and if used CORRECTLY will preserve the formatting, spacing and etc.  It's the identical editor used here in the forum, and on many, many sites. 
When copy/pasting from Word, Open Office, Libre Office, you click paste from word, c/p from the clipboard in to the little window 
When uploading a .txt file (which is going to be discontinued), you MUST add the paragraph containers.  Plain text editors do not use actual line breaks and what have you such as a word processor will use. 
If using something other than the above mentioned programs for writing, use the icon for copy from the clipboard.  DO NOT use the icon for copy as plain text.  That will strip anything you have in there, such as paragraphs, line breaks and whatever else.