If you do go back to Android, I believe the app "Tasker" can auto connect to bluetooth, amongst a million other things it can do.
As to the fannying around with the home screen, you don't have to. That is personal choice. You can even skin your Android like an iPhone if you like.
Please note, I haven't actually got an Android yet, but will be very soon. I am still on an iPhone 3GS. I got fed up with the iPhone OS in the end and it was only when I realised what the Android could do that I wanted to switch. I felt like I had been blinkered by the general impression that iPhone is the bees knees. Its all marketing hype.
I do like the iPhone phone, it feels nice in the hand, has a good image. But its very basic at the end of the day. I'm going to get an S3 shortly, despite the fact it feels a bit cheap. The functionality wins me over big-time.