You should let us know which Linux Mint edition precisely you are complaining about.
Some dialogs are not existed
You might like to give some examples so that we know what you are missing.
some settings are gone.
Dito. You might like to give some examples so that we know what you are missing.
How turn everything back?
Hm. Without knowing any details how could we offer any advice?
And why break something you are not created?
Telling from my Linux Mint 13 32-bit xfce 4.10 I cannot confirm that the makers of xfce 4.10 or the makers of Linux Mint 13 broke anything either in Mint or in xfce.
Xfce remained only one of very few usable desktops, but some one must apply his knowledge and make it less "complicated" like Gnome...
This is a very subjective judgement. And which Gnome are you talking about? Gnome2? Gnome2 is dead. Gnome3? Gnome3 and xfce have got little in common. And from my point of view this is a good difference, because I refuse to adapt to Gnome3.(Purely subjective decision.)
This is one of the main reasons why I switched to Mint Cinnamon and Mint xfce 1.5 years ago. Yet, my subjective impression is that indeed the menu structure of xfce is less well organized than the menu structure of Cinnamon. And Cinnamon is still improving rapidly.