One of the main reasons for cloud storage is so that you can access and edit tracks, add cuepoints, make and edit playlists etc. with your music on multiple devices via MIXO. Here's a bit more info on what you can do:

https://support.mixo.dj/guide/what-exactly-does-mixo-do

https://support.mixo.dj/guide/how-does-mixo-work-with-multiple-devices

However, I have added the option to select what to upload to our roadmap

https://support.mixo.dj/t/selective-upload

For your second point, we totally agree with this and have several ideas on our roadmap regarding auto-update of database files for all major DJ software. I've subscribed you to these so you'll be updated on their progress.

https://support.mixo.dj/t/auto-sync

https://support.mixo.dj/t/update-collection

https://support.mixo.dj/t/keep-browse-path

Thanks for the feedback and questions, and I hope this info helps!