Hello Thomas Fiedler, first of all thank for so clear instructions which allow people not only from development but also from other areas to familiarize with Eclipse. I work in Product Support, I do not need right now to write ABAP code, but soon I will need to create reports/note corrections to SAP Customer. I intend to make use of Eclipse.
I did not know Eclipse with ABAP, I knew Eclipse with other languages plugin before Eclipse Explorer challenge.
I think feature explorer in the beginning helps, once it is practiced it is no longer necessary as any other similar guidance tool. For new features it can be always relevant.
I do not know for sure about if that is helpful to onboard new developers I would like to check the comments of Brazil ABAP expert Carlos Machado.
I liked the QuickFix variable rename, quite useful.