And here we are, Blizzard exploited easy once again.
As you know now for season 3 weapon you need 1850 personal rating and for season 3 shoulders you need 2000 of personal rating.
So personal rating isn't linked at team rating, let assume you make a team with your mains, you have 1500 personal rating at start, you join into the team some alts, you do arenas with those alts, losing ever, and assume you get 1000 team rating, now log into your mains, go and play arena facing lowbies arena teams and reach 1500 team rating very easily, translated in personal rating that is 2000 personal rating XD. Now you can buy your shoulders and weapon.
GZ Blizzard!