i think it’s better to use english here…
i can do nothing for your 1-3 suggest, but could do some help for the fourth :)
there is no statistics fucntion for search so far in Emeditor i think, but you can do it yourself by using replace all fuction, replace what you want to search by itself and then check the status bar, you will get what you want.
and for the “Find in Files”, you can add “Find in files” even “Replace in Files” in to Toolbar using “Customize Toolbar” by right click in toolbar, also you can set shortcat Key for them.