Your activities sound useful and worthwhile. A comment on this:

And, as it has been seen on our entry level numerical physics course, learning programming, numerics and physics the same time is really quite hard.

Yeah. My feeling is that the numerical side of things is a lock to get short shrift in this type of course. In my own education, there were certainly lots of nods at numerical work, but they really undersold the subtle difficulties of doing numerics well.