I'm using pyzo_in_leo only to see how useful it can be.
It uses a lot of screen area in Leo; pyzo docks have minimum size, so you can't drag them to very narrow space. At least you can toggle pyzo docks on/off if you like. This is one reason think it's good to retain the python_terminal plugin for now.
With pyzo_in_leo active, several times I have observed a bug where the outline column goes blank, but is still functioning. You can arrow up/down but the headline text is invisible.
Regards
Lewis