New rank system: I just find it very confusing, I do like the idea of displaying the user's badges (highest badge per each type)
Community Dynamics / Powerusers: is Microsoft planning to merge these two forums? I often help on Portals forums, but have to go through both sites to check the posts, perhaps at first I would suggest prevent users from adding new Portal questions in the community dynamics, instead offer a link to come to powerusers
Accepted solution: the accepted solution is copied as a "2nd" post to that query and this is common in several forums but I don't like the experience.. for Portals forum we usually don't have a lot of answers to the same post, so it usually ends up the first answer being the solution.. and then it gets duplicated, I would suggest something visual for example copying the answer but leaving it collapsed maybe?
Signatures: I can't seem to find a way to add signature to my posts, is that possible?
Username: Why can't we add "spaces" to the username? I suggest having a "display name" attribute if possible
Community Dynamics/Powerusers: I am not aware of any plans to merge communities or platforms at this time. Each community has its own community management team.
Accepted Solution: This is out of the box functionality for this platform.
Signatures: Signature use in the community is not granted to all of our users. You will notice that the users in the community that use a signature on their post are either staff members, support teams or our most active users (SuperUsers).
Usernames: This is out of the box functionality for this platform.