Can someone tell me why 343 is taking so long to release the Specialization.
I am a level 70 and can’t rank up.
Bro there are like 50 threads to this subject…if you look around maybe your question will be answered. Just wait two more days. (Nov. 30th)
I specialized. And I’m Level 54
Just give it some time, and sooner or later, you will be able to rank up once again.
I’ve been locked for almost 2 weeks now, but that just allows me to enjoy wonderful games such as Counter Strike, and TF2. 
Aha, I actually created a thread on this exact topic several days ago. Many people are also undergoing your current predicament and the subject has seemed to lead to various flame wars.
Anyways, if you purchased the standard edition (which I assume you did as you are also stuck at level 70)and you played before the 20th of November you should receive an email from 343i/Xbox that contains a code to unlock the 6 remaining specializations.
There’s been alot of confusion over this subject but apparently you’ll get this email on the 30th of November OR the 1st of December - no one knows for sure.
Hope this helped, and I too hope that the new specializations will be released soon.