The rating change is strange. I did 10 games this week on my 5 shaman and went 5-5 from a new team starting at 1500. I ended up team rating of 1457 (or around that cant remember exactly) and a personal rating of around 1500. I was just happy I could win some now. I beat a team with 3 pallies and a dk with uber aoe twice. 5xts 5x nova 5x magma.