1. In the R2 release due out in the next couple weeks we have added better Globalization support for non-English characters. Localizing the UI will not be in this release but we are looking at it for future versions.
2. Moving tasks from one story to another is not something we specifically have in our backlog, but the use case you mention is. The ability to split stories is a feature we would like to add and I have included your note about moving tasks when splitting.
3. We have a story in our backlog for improving estimation roll-ups. I have added your note about iteration capacity to this story.
Thanks for all the great feedback!
the Telerik team