The OnePlus One has long been plagued with touchscreen responsiveness issues, but many of them were resolved in later versions of CM11.
With the release of Android 5.0-based CM12 in April, the issues reappeared, along with some Bluetooth connectivity problems and MMS inconsistencies. These have been cleared up now with a new build, YNG1TAS2I3, that can be installed to a freshly reset device if desired from the recovery menu.
There’s also a smaller incremental OTA update that can be flashed from recovery over build YNG1TAS17L.
How are you enjoying CM12 on your OnePlus One? Or have you transitioned to OxygenOS?