Due to how the backend is structured, it is not possible to customise the url format (at least, not the /topic part). Removal of the slug is potentially doable, however.
User Profile info on topic
I had on my template the "user joindate" after the avatar on a topic, with this command was working nice on 0.6
That command doesn't work on 0.7. do we have a replace one?
My best guess is that between .6 and .7, we made the decision to only show a certain set of profile settings. Prior to this change, any plugin could save any data into the user's account hash, which was a potential security vulnerability.
Now, you'll have to register a listener to
filter:user.updateProfile, and append the field you want to save.
I think this is what's going on...