The matrix can be a great solution. Not for all but it just depends. It can cut down on repetitive sources like cable boxes, blu ray, media players like ATV, etc. Its nice to potentially cut out 3 or 4 cable boxes. $15 per month x 4 x 12 adds up. Just a thought.
If you decide against a matrix and do local sourcing and hiding in each of the rooms it will be more than a couple of hundred dollars. You'll need to buy or rent all of the sources, an IR kit or universal remote for control, electrical outlet in closet, additional installation for these products, shelving, a balun kit multiplied by the number of sources you do, or combined with a splitter, or multiple runs of long HDMI.
If you take all of this away you can partially fund a matrix. Yes maybe you can't access locally a BD player, but if it's only a bedroom or den, you'll wont watch that many, plus BD is disappearing with streaming units becoming the standard. Not much of an issue IMO.
If you really like google play, and I'm not a google user, you should be able to deliver it thru a chromecast. If the CC is on the matrix it will broadcast everywhere.
The wireless music bridge is a nice piece from C4 but it's not an integrated solution. It's just like AirPlay. Sonos with the EV driver is better. if you are looking for a integrated system you need to compromise a bit. Control4 can deliver but you should make some changes upward.
Also If you are not doing HC-250s on secondary TVs you won't get on screen GUI. Not sure if it matters to you.
IMO it looks that the integrator put a very modern system together for you that will be easy to use and do well into the future.