The feature to add a <p> tag on hitting the enter key twice is not supported out-of-the box, but if you would like you can try to implement it yourself by attaching to the onkeydown
event of RadEditor. You can see how to attach to the content area events in the following help article: attachEventHandler
The second problem appears when the content is selected and the h2 item is applied. This operation wraps the content in P tag wrapped itself in H2 tag, e.g.
This scenario is logged in our todo list and we will do our best to fix it for the next SP2 release.
If you have an empty selection and apply a heading tag then the content is correctly wrapped in h2 tags
and you can go outside of the heading tag by just pressing the Enter key.
For your convenience I have attached a video demonstrating my test.
All the best,
the Telerik team