Biggest change to me in this release is that iOS now switches language immediately with hardware keyboard rather than after the switcher animation ended. This

Biggest change to me in this release is that iOS now switches language immediately with hardware keyboard rather than after the switcher animation ended. This problem is not very noticable if you do not use non-Latin input method. However for some languages (Thai in my case), in iOS 10.2, it means you will have to wait a little moment until the language switcher faded out until you can type in the target language, otherwise it will still stuck at previous language. I'm really glad to see this fixed. (Previously I workaround this problem by using Capslock, which seems to be able to make iOS go into latin input mode.)