Some issues with 16.04.1

I've decided to start a new thread on this, rather than keep adding to me 14.04 to 15.10 thread.

I have upgraded to 16.04.1

I am finding a few issues. So far:

1. Wireless coection is unstable. I'm using wired for now.
2. Monitor switches off after being left idle, and the only way to wake it is reboot. I've now tued off the sleep mode, but that's not ideal either.
3. Ubuntu software centre is still in my menu, but won't load.

I'm sure i will find more, but any thoughts on these would be appreciated.