It would be nice if one could drag a file to the working copy and add or replace a file. The operation would probably need to be governed by a user preference stating which mime types may be dropped, like images for example. This is convenient for non textual non code oriented assets where version diffing is not needed/desired.
Thank you for your feature requests.
I added four entries on our issue tracker and we will consider implementing them in a future Syncro SVN Client version.