Android Lollipop is touted as the 'biggest' update to Android till date, but that doesn't mean everything is hunky dory. There are still some things that users are complaining about, as they always do.
Gmail for all email accounts..
The Email app, which used to be present in earlier versions is gone. This means that all your accounts will be managed by Gmail, even ones created on Hotmail, Yahoo etc.. Some find troublesome at best, and an invasion of privacy at worst.
No silent mode..
Ok, the Priority Mode is definitely a very good addition, but that doesn't justify removing the Silent Mode. You may still want your phone to make no noise at all. We're not sure if this is a glitch though, so let's give Google the benefit of the doubt till Android 5.0.1.
Calendar app..
The Calendar app on Android 5.0 is not as functional as it was on KitKat. Many users have been complaining about this. You can't pinch zoom and a lot of other features are also missing.