Just as a side note.
This may change now since Star wars is in Disneys hands now and I dunno if Bioware has to follow the Star Wars "rules" but...
I forget which media but someone made a Wookie Jedi and George Lucas said "no more of that, Wookies can't be Jedis". That one wookiee jedi exists but no more were allowed to be made. So having the option to unlock Wookies as Jedi would go against the Star Wars "rules"
I have no idea why but I'm pretty sure that happened.
Edit: Ok there are like 3 jedi wookiee but George did deny it.
http://starwars.wikia.com/wiki/Wookiee (look under behind the scenes)