Well problem with MAVNI is that:

• It's US army only, so you cannot enlist into Airforce, Navy, or any other branch of the military (that could be changed with an EO, but I don't see a certain spineless democratic president signing one). In case you don't know - the army are the foot troops, you'll be one of those guys on front lines with highest risk of getting shot at.
• It requires you to either be a medical doctor, or be a native of a country which speaks a language that they seek, also note that a majority of the languages on the list will make you scratch your head and ask yourself "where do they speak this?". You cannot learn the language required to qualify unless you're a citizen of a country that speaks the said language (so you cannot for example learn Czech in order to qualify unless you are a Czech citizen).
• If you enlist as a non-citizen you most likely will be limited to the shittier jobs of the military, since you won't have the necessary security clearance for the better ones. (This applies to all non-citizen enlistees).

I'm a little disappointed, since my native language that I can sort of speak and write (really rusty but I could definitely shape it up) is no longer on the list for 2014.

Mavni could definitely be extended onto other branches and without the language requirement, however I really don't seem Obama doing anything of the like.