From a gameplay perspective 12.12 has been fantastic. But there are some serious stability issues with the current patch that make me question if it was tested well enough before going live.
Massive Audio Errors, the audio stutter when loading in or exiting a raid is horrible, and the phantom noises and lack of sound that happen in raid are really bad.
Terrible Graphical issues, I've had all shading suddenly disappear from matches where everything is suddenly bright and easily visible even indoor environments. And one of my friends has repeatedly had all textures go completely black on him on numerous occasions now.
Quest errors, Exp errors… item errors… the list goes on. Several of these things were not a problem at all before 12.12 and they make me feel like the patch in general was rushed out to beat the holiday…
Edit: And servers are down lol…