Yeah, the main thing Win8 Media Center brings is the ability to play DVDs. MS removed that ability from the regular Media Player in Win8. I have MC installed and don't have any problems, and haven't seen any problems reported by DAW users. Even if you don't think you'll play DVDs on your DAW, you never know if you might need to play a training video, view a performance video, etc., down the road.
The main problem with the free Media Center was that they contracted a third party to distribute the serial numbers, and it was totally screwed up at the beginning. Some people were waiting weeks for their serial numbers, others never even received them. Now that the rush is over, the system seems to be working better. Also, I would think that MS would have fixed the hole that allowed using the MC serial to upgrade to Win8 Pro by now. That was discovered back in November.