You might have more responses posting this under the "custom installers" area.

You will also likely hear "hire a pro". Setting up a reliable, customized, user friendly interface for all this "stuff" is exactly what we do. Not sure what happened on the first install. I'm a little confused because you reference an audio company that did the C4, but you also have a C4 contractor on hold. I'm just a sales guy, so I will leave the technical responses to those more capable. Your profile says you are in LA. I'm sure there are some members in the CI lounge that would be glad to look into your project.

Without knowing all the details, I don't want to assume and slam the original company. I can say that with the right company, you will end up with the best possible experience. If there are control limitations, they will point those out up front.

Give these guys in the CI lounge a chance.