I agree they make putting things in one place easy but also belive in that a camera is a camera a book is a book etc so dont rely on them on there own.
As for the brightness most of them come out with an auto setting that tries to balance it out for you but you can override this I use a program called widgetzoid I think its free and it lets you put toggles on one of your home screens etc I use one for the screen and it will go from like 0 - 100 then auto in steps so you can set it how you want at the time.
Its also good for quickly setting up the wifi hotspot turning wifi on and off bluetooth etc so its a nice little prog to have use it on phone and tablet and it will be going on new phone when I get it next month