Så nu har jag gett Apple lite feedback
Problem: Today I do not dare turn on contacts, calendar , email etc on my iPad because I fear that my children will make a mess by accident . Settings > Restrictions is too limited and too complicated to have to remember to activate every time the kids want to use the iPad and then deactivate later.
Solution: I would like to confine my children acess to only a few selected apps. This connects to a separate login passwords from the lockscreen (much like a guest password ) . Myself log in with my master password or TouchID and get full acess to my iPad, its apps and what ever.