I did what you are thinking of doing and after two days I "un-did it"
1 .I like using different themes and you can't with 6.0
2. that tray click drives me nuts every time you want to do something
3. My browser was either slower or got hung up frequently
4. the Options section is about 1/10 of what the 5.0 OS is and not easy to operate like the 5.0
everyone likes to be comfortable using their phone and I am very comfortable with my 18.104.22.1683....