So I take it your tablet has cellular service since it is downloading from the cloud? When you pair your phone are you pairing with the tablet or to the headunit? It will be a pain to pair to the headunit since you have to pull the dash apart to access the buttons (i guess you would only have to do this once though). It would also be a pain if you actually use the normal radio since you wouldn't have access to preset buttons which I guess your steering wheel controls would scroll through but if you ever pull your battery and lose your presets then you have to pull the dash again.
Idk I see positives and negatives, but whats important is that it works for how you want to use it.