The game launched with raids open first day (this is how it was during original launch but the difference now is that there are no-life’s who were ready to hit 70 first day and blast through all of the raids) yet arena doesnt open until the 14th.
Right now, it takes about 7-10 hours for a single piece of honor gear. Some speculate that honor rates are way lower than they should be but that’s a difference discussion.
On the 14th, you’ll be queueing into people who have had 3 resets of raids for gear. To make things worse, horde BG queue times are literally an hour. Making it physically impossible to grind a full pvp set even if you wanted to