TBH, there's little chance of any FF becoming canon unless officially published by BioWare themselves - I don't think that this has happened as yet though. In all honesty, there would be swathes of fans who wouldn't accept it as canon anyway if it didn't fit their notions of the MEU.
That said, and as I've never posed the question directly to BW, I can only suggest that contact them and ask for an official response. I've contact BW before to make sure my twitter feed thing I was using to promote a works wasn't crossing any boundaries in terms of product ownership (they said as long as I don't try to make out that I'm from BW/EA, then there's no problem).
IIRC, Didn't Mac Walters come into the fold by submitting a story to BW (I think Gaider or Karpyshn at the time)? At any rate, cracking into the business in this way is difficult, from what I've read, especially without references and a portfolio.
This is why the modding scene became such a godsend to certain people, and also why it's become a battleground in certain cases. At any rate, I've been involved in creating a story and quest mod for the Elder Scrolls games (mostly QC and bug testing, although I also did a bit of story work for now-defunct projects). I also tried my hand at some cosmetic stuff, but it was built off other people's works (and I had those people distro the mod of their mod, as it was only fair).
However, a few people have parleyed truly amazing mods into job opportunities (like Falskaar's creator). Moreover, the Nehrim crew always make amazing total conversion mods for the ES games, and I would love to see someone tackle a similar production in the realm of sci-fi! For myself, I've toyed around with using the Shadowrun Toolkit, and was considering using it to tell some Mass Effect stories...but alas, that requires more patience and time than I can afford to give right now.
Oh, and hello again! I know, I've been lurking forever, lol!