I have been through this phase twice in my whole life. So i can understand how u feel.
The cert would not be outdated...
In real life, companies not only see your certificates, but also your speaking skills..
Ask yourself this question, do you want to be "worthy" of your JLPT 2 certificate or just get the certificate and be lost when people start asking you to say "What do you like about Japan?" in Japanese?
It will still take a while for them to know the new 'N' system, meanwhile, what they know is JLPT 2, not N2.
I've been through 3 rounds of Japanese interview just to get my current job....
1st interview: I was asked about myself. Self-introduction in Japanese, my hobby, what i do during weekends,etc
2nd interview: I was asked about "What do i like about Japan? Why study Japanese? How much do you know about Japan? Do you know that opposite Mount Fuji is what mountain? etc..."
3rd interview: I was asked to troubleshoot an IT problem in Japanese.
Not trying to scare you or boast, just stating the facts about Japanese companies. They want you to know them as much as possible. When you know them better than the other candidates, you are at a upper hand. If you are deciding on a Japanese job, be prepared to answer things like that.
I didn't have my JLPT 2 cert back then, but i got employed, based on my speaking skills, my knowledge about Japan and my sincerity to learn more about Japan.
Fair enough, with that, i earned myself a free trip to Japan for 2 weeks for training.
Now i am back, i am more willing than before to share with people my experiences working with Japanese. Really a fantastic experience.
Hope it helps you make a decision. =)