I was going to mention the same thing they wouldn't have built the Crystal Sky using the Android platform if they hadn't intended keeping it around. Android will always be supported DJI would lose too much Market if they abandon it.
I've found the flying with on-screen controls is just awkward for me, I like the feel of the sticks under my thumbs. Also starting / stopping recording, capturing photos is easier with an RC. You also have the full 30mph advantage of sport mode with the RC too.
I purchased the Osmo handle kit back in April, I just purchased the handle because I have the X5 and X3 cameras for my Inspire. It does an excellent job, the built in Mic isn't good but just get an external mic like the Rode Videomicro.