Brutal Chess is one of the best chess interfaces: fast to load, SIMPLE, beautyfull and easy to manage.
These are importants caracteristics for a software.
Now, for example, if you insert other options like UNDO or ZOOM the board or maybe insert windows inside the screen or any additional setting you risk to change two elements of this game, the playability and visual effect.
Maybe with the new version and its possibility to use other chess engines i will be satisfyed.