i think there's far too much complaining going on here, for what was totally obvious. When I chose the Inspire, it was always obvious to me that all the features, app etc, would go to the Phantom. It is obvious business. The phantom is DJI's main line of income I would imagine, and they're not going to overly restrict its development just to keep Inspire owners happy.
All this tech that is in the inspire has come about because of testing and developments on the phantom, so we can't complain.
so the phantom 3 can more or less do anything that an inspire can do. Sure. But not all, and not as well. An experienced operator can get it to do better stuff than a beginner on an Inspire, but then a rally driver could get a Golf GTI round the Nurburgring quicker than I could get a Ferarri round. Does that make the Ferrari crap? No. I'd still rather have the Ferrari. And I'll put up with the rally driver's smugness.
If you look at these kinds of industries it's the same everywhere. can a professional photographer get a better shot with an iphone than I can on my D750. Sure. but I love having my D750 and I can put new lenses on it which will keep me interested.
etc etc etc.