Yep, they made GW easier for the lvl 85 people who were fighting teams 10 to 15% more powerful then their strongest team. So, now it is capped with teams that you should be facing right when you turn 85. You are correct, GW is harder for you. On the plus side, since it is no longer a sliding scale, in a few weeks of improving your roster you should be able to finish it again.
Prior to the change I had finished GW 3 times in 3 months. Each of those times I wasnt fighting 2 or more CLS teams.