I have no immediate plans to remove FCKeditor based on the feedback of several who still prefer it. I still think in the long run that CKeditor will emerge as the best choice but it does still have a few issues.
I am using CKeditor on this site and have never seen any issue with the cursor, is it happening in all browsers or just a specific one? I would try re-uploading all the CKeditor files and make sure your Web.config is using the latest version that shipped with mojoPortal.
When I use TinyMCE and try to edit existing content, it turns it into a text block that is easily erased.
I'm not clear what you mean but again I would try uploading all the TinyMCE files again and make sure you are using the latest version in Web.config.
Each of the editors has different configuration solutions based on what the editor provides.