i've used pr 1.1.1 since 5 days and so far there are no issues with it even though i'm not from that area. pr 1.1.1 also has upcoming calendars in the feed screen.

i highly recommend installing it as its more stable in the sense the occassional lags of pr 1.1 are not there. it could be a placebo effect but overall i think its a good idea to install it.

edit: the n9 auto-detects your region and language if your sim card is inserted during flashing so you shouldn't be seeing any MEA inputs or languages. Try not to restore settings after flashing as i lost the ability to use devel-su. Had to re-flash to get the function back. It could be as i'd developer mode on before the flash.