Breckfest v1.6.0 brings a whole host of improvements and features.
The biggest is the improved squish performance. Large textures should process in a fraction of the time.
We have the new -noreplace command to prevent breckfest from dropping random ".x" into the filename. While I didn't use the PR by talberti, I did steal the concept!
There is a -dds command to tell Breckfest to spit out dds files instead of png. Significantly quicker to export as no decompression is necessary.