If I was at MS, this would be a tough call to make.
First of all, delaying to 2014 is a non option.
So it comes down to releasing just in the regions where localization is complete. So if we assume that is the hold up, then that was why the cut it back to 8 regions.
Now they are looking at their current progress for those 8 regions and seeing that they may not have voice commands done for all 8 by launch. They probably think its unwise to reduce the number of regions any further, so they have decided to roll out the update for the missing regions as it gets done.
Personally, I think they are right to not release in regions that cant access all of the X1s features, especially one that is so integrated as voice commands. Even if you hate the feature, MS cannot go by your opinion. Voice commands are spreading across many markets and there are plenty of people that like using it when it works as expected. If MS wants it to be an advantage of the X1, it needs to work correctly from the first day a person buys the console. If you mar that launch experience, you could damage the value of the console.
Some say that they should just release it everywhere in English and then roll out updates later, but you can't tell me that potential customers in those regions won't have a poorer experience because of that. In that scenario, the voice commands wouldn't be useful at all.
If I was in a country not getting an X1 during the first wave launch, then I would consider importing it or just waiting depending on what they announce for further launches. If I'm not interested in an X1, then none of this matters, but if I am, then I would consider the above options.