I don't really notice anything wrong with his passing. Just don't try anything spectacular with him. I replaced WC Blanc because of his passing and Vieiras' is lightyears ahead.
Got his 88 from the mid icon sbc and have played with him in 2 Weekend Leagues (15/5 & 14/6) and roughly 20 rivals games (Elite). He's been decent enough for me. Brilliant interceptions, tackling and his strength is next level. The only down side is his turning speed, its like the Titanic at times.