Michiel, the patch on #1049855 has been rejected so there is no longer a
fix for the first problem to be solved.
Also, the fourth problem you described is not entirely true, it is
possible to run tkinter apps on IDLE without calling the mainloop
function (see #989712). It is possible that this wasn't the case 4 years
ago, I don't know, just pointing out the current situation.

I also don't understand how just moving event handling to Python will
solve the problems. But maybe it could be good to add an option that
would prevent calling EnableEventHook in _tkinter after loading tk, so
the user could handle tk events and what not the way he whises.

Is there anyone still interested on this ? Please ?