I also occasionally lose functionality with the slider keyboard. A reboot resolves it. I think that's a known issue as well.
- Camera is a known issue.
- WiFi is funny. If you're doing MAC address filtering you may be running into what I did. The MAC address is changed by this code. I don't know how or why. (Not that MAC address spoofing is particularly difficult, I just don't understand why this code is doing it.) For reference, my MAC address was changed from stock to d4:94:a1:f2:58:d2. I'm curious if everybody gets the same thing or it's random. I am consistently getting this MAC address, however.
- My bluetooth works fine. Try clearing cache or defaulting the phone. Might need to re-pair.
- Never had a problem with play store. Might want to try reloading it from a backup. Again, might need to clear cache or default the phone.