Hi Thibaut,
You're right that having all the buttons in one place can be confusing and
scary for beginners.
Me, G and JV also did some sketches of the menu, where all the complicated
(non vital) functions would be placed in "More actions".
The menu is still open for discussion and sadly it won't make it in the 2.0
version.
Also, about the advanced users we have advanced / simple menu display, which
is not perfect at all but this could also solve the problem of advanced /
beginners in term of usability.
Thanks Thibaut for your use cases :) they were lot of fun :p