I just dual queued for slaughter and secure, having mostly done Slaughter only the past couple of weeks since it was the only way to get a decent queue, and I actually got a 24 man Secure mode pop. We crushed the other teams. I really do like 24 man secure I'm finding because you have so much more control over your win rate.

I don't know firsthand of people going Flames or Maelstrom to Adders, but I was around 80% win rate after Slaughter came out and before the patch according to the PVP info screen, though it was only around 60% for the 7 day window on lodestone rankings since that's computed for a different 7 day window than the Tue server resets because of a couple of bad pug groups. But that we had such a great win rate makes me wonder if people who weren't yet invested in having a high PVP rank and so had little to lose by switching came to Adders and hosed our queues. Not that I have a problem playing with people new to PVP, I was new as well when FL first came out, it's just that I'd rather play with a fair mix of people than have it be based on who joined the bandwagon the week after a new mode came out via the patch.