One thing that might be nice for the Addon Manager is a way to manually check for updates. Being on a metered internet connection I cannot always be online when I use the manager, and it always seems to take forever to come around asking again if I want to download an update if I had to turn it down previously (i.e. online and then go offline , start manager and it asks if I want to download). Why, not sure it does it this way, but it just did today as I had just gone offline with the simulator running, and had to cancel the download.
Thanks for the consideration!