I think the person is mentioning SkyDrive and Office as pluses not for the Lumia series but for his phone, wp, in general. I have used office on a smaller screen and from in our house with four top end devices, the WP has the best keyboard, IMO. I am not confused by your name, BB10 fan, as you clearly state you are switching to BB10. Hence you are a BB fan an not a WP fan, which is all good in the universe. I find postive and negative in all the OS's and ecosystems.
With this subject you can insert any device and OS into the subject line. In fact if you go to Crackberry, Droidcentral, etc you will find posts similar in some way. The responses will usually be a mixed bag from kind, insightful, angry, and strange. Some responses may feel WP is awesome and the OS is smooth and effecient. Another comment, like WasteNoTime's comment, will be negative about the ecosystem because an application is not in the marketplace yet and the developer does not have a release date. Which, I don't know why WasteNoTime you feel "lied" to and the lack of a timetable is a slight annoyance, but is truly no different than other OS's. Finally the comment I prefer to the topic is to choose the device and OS that works for you. I prefer WP and IOS and even though I like the galaxy SIII hardware and my wife loves the device, I am not a fan of google nor the OS.
My opinion which means nothing to anyone as it is relates to my presonal preference, feelings, and needs. All of which are different than others. Some people use twitter and instagram all day long, personally I have zero use for it and find humor that others need attention so badly that they post pictures of the bagel they ate in the morning and the running shoes they never use. The lack of applications is only a slight annoyance. The biggest annoyance on WP8 is Xbox Music/video. Having other devices I can honestly say out of thousands of applications on ios and android we use maybe a few consistently. Having options and applications are nice don't get me wrong, and are a positive for any OS.
Also, the internet is full of people with an agenda. My friend has apple stock. Spreads the word of Apple and tells everyone the "Bill Gates Machine" is the devil. He knows zero of WP, W8, etc. He has an agenda. People lie and create issues to further "their" cause. "People are Strange"...
In other words. Depending on what you use your phone for and your likes/needs will determine if WP or any OS is for you. Don't let anyone tell you different and remember if they are so passionate about telling you something is one way they have an agenda. ::End Rant::