how to minimize subsite admin dashboard options?

I want my client to have admin dashboard but just to add pages and posts but want to hide most of the things - to make sure things appear simple and easy for a client.

When I use Custom Admin Bar or ultimate branding these two plugins need to be activated on clients site to configure them, but then they have an access to these plugins and can just mess with them.

Can't I just control them from my super admin dashboard? ..or something similar so that the objective is achieved?

thanks