P: Lightroom Ecosystem: Selective Sync

I'm not a professional and have only used Lightroom for less than a year. I do love the redesign and I want to use it but I don't like the auto-sync. How hard would it be to implement an option that prevents auto sync and instead enables manual sync? 

My idea is to add a manual sync option in the settings and when you want a photo to be uploaded to the cloud you should be able to click on the cloud button and hit "Sync" or "Upload". Taking away people's ability to choose doesn't just scare away the pros but also the beginners. 
Also, some advanced features from the original Lightroom need to be added. One of them is the export function. The new export function is terrible. I only see "Small, Full Size, and Custom". The original Lightroom has a lot more export functions.