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It needs all those permissions mostly to enable it to send messages using your phone, hook itself up the vibrate feature, hear you speak, send pictures in messages, etc.
Honestly that list seems perfectly fine.
I do have one app on my android that I am not updating due to the owners of the app not needing "access to read your SMS messages" and that one is Telstra 24x7.
The list you had seemed ok though as it needs access to those things for the functionality of the app.
The bigest drawcard for someone to use BBM I think is the free messages to iphone, android and blackberry users.... Everyone is using the apart from 3.9% of the market who use windows phone.