I don?t really understand what there is not to like about W10M when compared to WP8.1
I didn?t test any of the beta builds, and instead waited for the official update which for my phone (Lumia 640) and carrier (Q-Greece) came a few days ago.
Having used W10M a few days now, and really trying to test everything in depth, I like pretty much everything about it. Here are a few highlights:
Much better versions of OneNote, Word, and Excel. They all support password protected files and tabs for example. Other improvements are; consistent file history, similar menus, remembers where I was in OneNote on the other device.
Several email accounts contained in one version of Outlook (in 8.1 I had 3 Outlook icons).
I use Groove (and have a subscription) on my PC, and the mobile version is now much improved. I can for example see my songs listed in ?most recent first? order, like I have been doing on my PC for a long time.
I use 3 different keyboard layouts (English, Swedish, and Greek) and ?Word-Flow? now works in Swedish.
The settings menu is in my point of view very much improved, and it is great to have expanded quick keys. I don?t really care if the slider switches have rounded corners or not. Overall I find it much easier to find what I am looking for with the new settings layout.
My home screen looks almost identical to the one I had in 8.1 so I don?t really see the problem someone reported there. I did however notice that some of my apps which got upgraded to work on W10M now have transparent tiles which actually makes my home screen even nicer than before.
As far as the hamburger menus go I like them as well. It makes the mobile experience resemble how things work on the desktop a lot more. I totally understand why they went down that route.
I have not noticed any reduction in speed. In fact, Skype now starts up MUCH faster, and I wouldn?t be surprised if other apps do as well.
For me W10M is just as ?fluid? and smooth as WP8.1. On top of that I also think most apps look nicer (this is of course a matter of personal preference). Outlook and the other Office apps for example now mimic the desktop versions much better and just look cleaner and nicer. The same goes for Groove and several other apps.
I haven?t really tested the camera much and am curious to know what some people have reported as being worse with the one on W10M.
I will for sure not downgrade back to 8.1