This extension looks promising, but I can't get it work on my 4.3 install (on wamp).
I can see that some templates are called in the admin2pp extension, I can see the mouse icon when I hover dashboard's blocks, but it seems everything links to JS is not working.
I got ezjscore activated, I have cleared cache and regenerate autoads, but still not working.
I don't know if the apache.conf changed are mandatory (may be the problem is only here but I doubt).
My problem seems to come from this new functionality in 4.3 which create only one JS file, and even after cache clearing and hard delete of the .js the problem is the same. I could I disable this functionality for testing ? I have added development in settings for the admin, but it still there ... Mistery for me.
You most likely are missing rewrite rules for packed js files(see install doc for ezjscore), as for rewrite rules for admin2pp you at least need to enable the once in icons.conf.