I applied the OTA update for 5.0.1 about 2 weeks ago. Since then my rock solid N7 with 4.4.4 has become slow and a bit buggy. I have tried clearing the system cache and also did a full reset. Nothing helps.
Right now the most annoying bug is I intermittently lose access to anything on my local network. The N7 states my local media servers can't be found.