On: Why the hell does this mouse need to connect to th...

[sysm]

You would bring your own mouse, however when you sit down at a tournament machine you will need to install specific mouse drivers and get it configured. Being able to sit down at any machine and just plugin your mouse/kb and have a familiar setup seems like a great idea to me.

[vacri → sysm]

You would still need custom drivers to use the cloud mouse.

[89a → sysm]

Why not just give each mouse a unique ID then, sync the settings anonymously against that ID. Don't even have to log in anymore