If there's a major shift in the software beyond interface cleanup and additional under-the-hood improvements, it might be the new version of Hangouts. The messaging app now fully integrates SMS and MMS, and replaces the "Messages" app from previous versions of the software. You can now send texts, instant messages, voice calls, and video calls all from the same place, giving it a feel much more akin to iMessage. It's a fantastic idea on paper, but a really clunky execution in KitKat. If you?re talking to someone via Hangouts, and then you text them via SMS, it starts an entirely new, separate conversation. Unlike iMessage, which combines everything into one stream whether you?re using SMS or not, Hangouts bifurcates those conversations, making communication actually more confusing and harder to navigate. Coupled with the fact that Google still doesn?t group separate accounts together in its apps, things are downright puzzling at times when trying to carry on a conversation. How can this be so hard? webOS got account linking and merged conversations right in 2009.
It's odd. The phone knows that the person I'm texting with is the same person I'm chatting with in Hangouts (the user card is the same), but those two conversations sit apart from one another. Why can't those conversations be merged? Even if you had to hand-select what kind of message you wanted to send, it might be easier than switching between two completely different streams. My assumption is that Google knows this isn't a perfect execution ? I only hope they deal with it sooner rather than later.
Nexus 5 review | The Verge