Thank you for your feedback, we appreciate it.
Yes we try to learn from our mistakes and we try to constantly improve our framework. In our next version we will focus on bug fixes in our current controls: RadGridView, RadTreeView, RadDock
... We will also present two new controls: property grid and list view. However, not always is possible to keep old controls in our suite. Our framework has a core used by all controls and changing or improving something in it will affect all of them.
Our policy is to help customers when they want to migrate their applications to the latest release. So, if you have show stoppers, please describe the exact issues and we will try to address them in our upcoming release, or we will try to find the best option to work around the issue.
If you have any other questions, do not hesitate to contact us.
All the best,
the Telerik team
Q1’11 SP1 of RadControls for WinForms is available for download
; also available is the Q2'11 Roadmap
for Telerik Windows Forms controls.