My two penn'orth:
1 & 2 - I can't get too worked up about these.
3 - I would agree - I tend to skip tier 2 belts and go on to tier 3 asap
4 - Sounds useful (you should up-vote one of the many, many other posts on this)
5 - Again - I can't really get worked up about this.
One observation is that it is better to have a single subject in one post as this allows for better up/down voting. Threads with more votes will be more visible to the devs and might well get actioned.