There is a quick link in the content area, where one will get a list of only valid blocks (if you're using AllowedTypes on the property) and they will get published to the page's folder and added to the content area automatically.

But yes, the workflow can be made simpler. In general, we're trying to stay away of having blocks in TinyMCE.

However, I don't see dynamic content as a valid solution going forward.

Thanks for the answer Johan!

How about making a button inside tinyMCE "create a new block" that does the same thing as in content area (they will get published to the page's folder and added to the content area automatically) ?

i think this is the answer to all my problems and would boost up editors work quite a lot..

Your way works but take for example a site where we have

2 video blocks
2 quotations blocks
2 other awesome blocks

and we will have text between them 

this mean we need 12 blocks in total, addistonal 6 rich text area blocks.. 

if we can make blocks insite tinymce we would skip the 6 additional blocks.. 

What do you think?

then you can remove dynamic content forever! :)