This is both peculiar and interesting; you'll be moving out of MS phones but will still be looking for MS services on a different platform. Why not stay with MS phones in the first place? Sure at the
current state of affairs MS doesn't, or rather couldn't, provide "first class citizen" requirements when it comes to apps and app support. But remember that MS is currently busy with Windows 10 development... and handling thousands of feedback on a daily basis is not an exact science and it is far from being easy.
I believe MS is working on something great. They're "invading" other platforms by releasing apps and Cortana to them. Now it is known that MS gathers feedback through Cortana... hence that move would effectively be enabling MS to gather information from rival markets - which I think is a brilliant idea. One may argue that well, MS needs the data since the market share is not as big, but data from Android + iOS + MS is definitely bigger than either Android or iOS alone.
I won't try to convince you to stay, but perhaps you may want to reconsider.. at least staying until W10 arrives in full.