No, it doesn't work. I have give 2195 a try on ubuntu 12.04 (I can test it on so many other distribution, but result will not change), for both fcitx and ibus (ubuntu default).
Please check what I said, I fully understand why sublime doesn't work. sublime is missing gtk_im_context_set_focus call. Input method will not process key when widget don't have focus, otherwise it will cause some other bug.
After I gdb attach and set focus manually. I still find backspace being grabbed by sublime text first, I don't know there is some other key is grabbed, but please check it.