It was stated we would see another 10 levels added to the companion cap, I don't see it in the official patch notes posted but it was stated in previous info. I've been wondering myself how we go about leveling but I see nothing as of yet, possibly a later update? I got a Tavnairian onion from a quest in Ishgard today but I don't want to use it until we see something about the supposed level cap increase. Guess I'll just work on the storyline and hope it pops in somewhere. :/