As discussed in the comments to previous posts, the general Stack Exchange concept of running a Q&A site works well and the features available are mostly useful, so things should not unnecessarily be changed too much.
However, on Physics SE there are certain things that are handled in a way which is rather counterproductive to building up a free academic community, which should therefore be avoided / done differently on the new site.
Here is a poll to identify what exactly these things are:
This list is most probably not exhaustive (and not too well-organized either) …
So everybody is welcome to point out in the comments what is missing or not formulated accurately enough, such that the list can be completed and improved.