Has anything happened to the drop rate of these mounts since the introduction of Triple Triad and cards as drops within extreme primals?

I've literally been farming Ramuh and Leviathan the majority of the week, 3-4 hours a day, and I've seen minimal results compared to patch 2.5.

Today I've spent around 6 hours farming Ramuh and I've seen 2 ponies.

Is anyone else experiencing a seemingly decreased drop rate on these mounts since 2.51 or has this just been really bad luck the entire week?