1) Yes, it's the same. RadMenuStrip should be changed in the documentation to RadMenu. Thanks for pointing this out.
2) We've done a lot to improve the design-time experience during the last two weeks and I hope you'll be satisfied with the results. We're going to release an official build this week on Thursday.
3) The installation is also changed and the assemblies will be added to the GAC on install. This way you won't need to add any assemblies to your project after you drag some r.a.d.control to your form.
4) This was also fixed.
Thanks a lot for you feedback. I hope you'll like the final build and the changes we've made.