Remember when Facebook and Messenger were once a single app? One of the main reasons they separated was to simplify user experience, aside from allowing sms login without a Facebook account, and I can't imagine the two together again at their current state. The reason why WeChat works so well is it's always been chat forward. Their 'moments' works moreso like a lite Twitter feed than Facebook's mess of a newsfeed. And all the misc third party integrations and apps are neatly organized and don't get in the way of chat and moments. Nothing about the interface or experience feels spammy or unnecessary and I never have to think much to get to what I want. At least that's just how I felt heavily using all those apps. There's something about all-in-one/mega apps that Asia does really well.