This wiki article provides insight into various specificities or questions about the Dr460nized Theme.
Dr460nized installs as a dependency the package kwin-effects-forceblur. This provides blur effects on windows and menus. However according to the source, it could be resource-intensive, especially if you have many windows open.
On Wayland, high GPU load may result in higher cursor latency or even stuttering. If that bothers you, set the following environment variable:
KWIN_DRM_NO_AMS=1.
If that’s not enough, try enabling or disabling the software cursor by also setting:
KWIN_FORCE_SW_CURSOR=0
or KWIN_FORCE_SW_CURSOR=1.
Intel GPUs use software cursor by default due to this bug, however it doesn’t seem to affect all GPUs.