The arena is insane these days. I dropped to 87 yesterday, and moving back up I saw many squads that finish top 10 to 20 in the sub 50 range as well.
To chime in with my experiences, my FO team still wins on offense and loses on defense. I pretty much exclusively target NS and RJT teams (I avoid titan teams like the plague), and so I've fought lots of Rey teams.
I suppose I've noticed they are a bit harder, but ironically that's because more underpowered Rey teams are moving up. I have a set rotation to deal with them, so if R2 makes himself stealth tank instead of GK because GK isn't modded properly, that actually can mess me up. But in fighting them, I do feel that Rey teams are the same.
I dunno - I wouldn't be surprised if a stealth change happened or unintentional bug slipped past QA, but right now I fall on the side of "nothing has changed but I'm willing to be convinced otherwise".
