I love this product and here is a way to make it better.
I prefer to put my PC to sleep at night or day times when I am not home. I have to wake it up before I can play any music on it. Another situational factor is that this is in a closet so I will have to open the closet and wake up to play music. I was using an app called hipporemote (iphone app) which has a feature called wake-on-lan. It takes a mac address and sends a wake on lan signal (I know this is a very easy one as I have been a developer). So the ask is to add a wake-on-lan in your iphone app which can wake-up the PC and then connect to it. Take a look at hipporemote.
I can give more details if needed.