Here are my pet peeves with EI10 after coming from IPhone:
-it does not remember my zoom range when my phone changes orientation by accident.
-no forward button
-the backward button sometimes will take you to the start screen if you happen to try to multitask and then go back to IE (so frustrating)
-no orientation lock
-no options to show search results by most recent. This I loved with Google. I could get the latest news on Nokia Lumia 920 but with IE, I get the same reviews pop up that I have already seen.
-Facebook mobile is horrible and the desktop Facebook chat buttons are very hard to press so its impossible to turn off my chat!
It becomes a bit frustrating to use and these are very simple fixes that makes me feel that Microsoft is just so out of touch with its users. IE can be great if they only listened to us! I am now anti Google due to the crap they put out for windows phone so I am really hoping IE improves ASAP