If you were only using WaveLab to burn CDs, surely there are more simple apps for that than WaveLab 
I think WL10 got rid of the “Basic Audio CD” but it’s not too hard to make a simple montage, add track markers, and burn a CD from the montage.
For me, the benefits are summed up in this article except in WaveLab 10, you can now very easily record from one montage track, out to analog gear, or and record back into a new track so really, the entire mastering process is more easily done in just one app:
In WL10, you can also send audio from the montage, to an external editor of your choice (RX, SpectraLayers, etc.) very easily, and there are a handful of other great new features.
The learning curve isn’t easy, but there is also really no other app like WaveLab so for some people and some workflows, it’s essential.