maybe I'm missing something, but Ubumtu Mate 16.04 (daily-build, like I tried it 10 minutes ago), does not even have Mate 1.14, it only has 1.12.2 , in the Main Mate Panel(s) -> "about"?, so Arch is probably going to have Mate 1.14.* officially in the repo's, for testing, long before Ubumtu, or LinuxMint, and even then, Mint would be the much better (debian/ubuntu) choice, instead of Ubumtu, if I had to pick between those two, but that's just imho.
Lol, they even copied Mint's "Welcome Screen" this time.
talkin' 'bout Ubumtu 16.04 mate,
mmm, all that hurt and pain, over the years because of Gnome3-shell/ Unity fiasco ,..., and the ffmpeg vs. libav crap, and a dozen other issues, (which was why I left them years ago), and here I am in Ubumtu 16.04 (Mate) looking at a somewhat "fake" Gnome2 interface exactly as it gloriously was in '06, in fact, the only thing missing is that brown-elephant's-ass wallpaper, that they had in the "real" Gnome 2, back then.
I guess that old saying is true, whatever goes around comes around.