Search for available addons from admincp.
Currently admins need to visit xenforo.com go to the resource manager and find available addons. It works but as it requires admins to take quite a few steps it means that less addons are being bought and used than a easier solution: make addons available right into the admincp.
Wordpress does this and it works very well:
I believe that making addons searchable from admincp will increase addon sales & addon use. This will enrich the xf addon community further.
secondly it would be nice to have:
Install & update addons from admincp
While this is not the best approach for security, its easy to install addons this way which means more people will be able to use addons.