There is no new version since 14/12/11. Microphone problem is reported many times in this thread. Be so kind, read it and don't post answered questions.
Where the hell you found, that LP was advertised to be for low end devices. This is simply nonsense. Only reason why LP running mostly high-end devices is simple. They have higher priority in update schedule. No one force the manufacturers to do this. They can start with low end if they have...
In fact Ivans LP kernel is modified Hell's Doctor Nexus4 kernel. It would be probably more complicated to grab this one instead M1chas one, which is already CM compatible and much better(new camera and audio HAL, fixed bugs etc.)