I get the idea that this has not been thought through properly, whereas folks like decentralisation this comes at the cost of a larger and more fault tolerant network overhead , the problem I,m seeing with some of these new features is that they can be exploited and leveraged against file sharers by the cartel, its for this same reason many features we would all like are not present in many p2p network clients, new features have to be traded off against abuse of the network and I,m not really seeing any such public information as regards any such trade off decisions in evidence, lets hope I,m wrong but I envisage a "mess" about to happen.
On a historical note, putting media players in clients is sort of "old hat", many of the p2p clients of 2001 and later vintage offer just the same facilities and in some cases have eclipsed the other functions such clients offer, most folks dont mind this tie in but it does mean in some cases that a new client is required each time there is a change in file compression algorithms and thus codecs etc, thus the stand alone media player should remain the preffered method of playback, thus future proofing the client from an otherwise earlier demise.