[gb2world]

Exactly- or clean up the templates - and worry about that when you have to go through an upgrade. For example - you are on 4.2.0 - which has known bugs. When you upgrade - then you will see what really is a nightmare and not intended for newbies. The more you have to modify the templates - the more difficult an upgrade becomes. Best to keep your changes in the css files as best you can.
In my opinion - when QT fixes the upgrade problem (by changing the software architecture) - that will lead to more complex css that will appear to be even more bloated, but the design layer will be more separated from the template and programming layers. So - you'll be able to change the design, without changing the other layers. To achieve that - the css will appear more complex than if you had custom designed it for a single website.