There's been plenty on this lately, just adding my story. I walk through GW everyday, sometimes hit a challenge here and there, but always make it through. I've been beating GW fully for months now. Today, on node FIVE, I hit a fully maxed and zetad Bastila lead with Yoda, Kanan, Ezra, and OB, and could barely get a hit in no matter WHO I sent in. Went through my whole inventory, and couldn't even erase protection on them. I have noticed far more OP teams showing up on random nodes in the past week or two. I think there really is something going on with GW, and there's gotta be some sort of glitch here to pit me against a team that would qualify in the top 50 in my arena shard when I'm sitting at 1075 in my shard.