Just signed up to evaluate this last night, looks good so far. As this is designed to be a single access point, I would find it extremely valuable to be able to search through all the connected accounts. Perhaps initiate an on-demand searchable index after login that would crawl through each account's file structure.
Currently searches seem limited to the last account accessed.
Also, a confirmation dialog prior to removing a cloud account would be helpful... remove is very close to rename.
Look forward to seeing how MultCloud develops.