OK, taking the various suggestions offered, here is what I think will be the final version, cosmetically, of oggdrop(carries yesterday's date), available soon at:
http://www.inf.ufpr.br/~rja00/
I have placed all the encoding options in one dialogue box.
On the Quality side, the slider has been increased in length and is, therefore, easier to adjust with the mouse. However, once the slider has the focus, left and right arrows keys can be used to set the quality level. Added narrative to make things clearer (hopefully) for 'newbies'.
On the Bitrate side, the separate CBR bitrate box is gone. selecting CBR now links and equalises Min and Max values to the value of Nom. Selecting ABR breaks that link and allows independent selection of Min and Max values.
I think that this is a cleaner interface for all levels of user. Hopefully, its clearer for 'newbies', and not irritating for the more expert user.
I am still pondering the other suggestions, but don't expect anything else too quickly, if at all. Some of the ideas would require major surgery in other areas apart from the interface, and I am not sure I wish to, or should get too far into that.
Anyway, 'you can't please all of the people all of the time', so ENJOY!
john33