The Nexus 4 is a great device, but some users, including myself, are reporting poor screen sensitivity. The issue has, thankfully, been pegged on a faulty touch driver that was recently added to Synaptics’ digitizer, and by reverting to an older revision users can regain some of that lost magic.
The fix is fairly simple to pull off, but you must have an unlocked bootloader, and already be rooted with Busybox installed. The .zip is flashed in recovery, either TWRP or CWM, and initiates a script every time to device is launched, downgrading the touch driver to the older version. This results in your phone being unresponsive for around 10 seconds at launch, but otherwise improves the overall experience of the device.
Head to XDA-Developers for all the details, and I can already tell you the fix works well, so if you’re experiencing the same issues as I am, it’s worth going through with.