I have a Note 4 but I still miss:
- flexibility of iMessage for sending pictures/video
- photo app
- overall iOS apps looks nicer than most Android app.
- mail app is better than everything I tried so far on Android (gmail,inbox,cloudmagic)
pros of my Samsuck:
- battery is good
- camera is also good (but I dislike the software). I tried not using samsung's camera app but there is a different in picture quality when I don't use the samsung app. For best results, I need to use the Samsung's app.
cons of my Samsuck:
- when I need to send a picture (which are always too big), I edit them inside gallery, it saves a stupid copy of the picture I just cropped, I open SMS app, send cropped picture, go back to gallery and delete the duplicate it created.
- permissions. There are plenty of old app that doesn't support Marshmallow security model, by default most of them ask for stupid permission (like contact,sms,phone permissions).
- weird things happen when I hold the phone without intentionally using it. Icons are moving to different page and things like that. I have difficulty of holding it without pressing the side power button and then a mess happen.
- bloatware
- several apps for same purpose
- slow update cycle for patches.
- samsung doesn't update touchwiz (still have no theme support on mine) even If I got the marshmallow update yesterday.
I was tempted by the S7, but I would have the same cons as today. Their new messaging apps announced at GoogleIO looked great but it still doesn't integrate SMS, and only a small fraction of people will install it.
Have you tried boxer for email? It's the best email app I've used on Android. Other than that though, there really isn't much to do with your cons list, you should probably switch back to an iPhone either when the 7 comes out or if you can wait until next year's, it's suppose to be a bigger upgrade due to it being the 10th anniversary.