I don't know much about using group slots, but it's nice to know the historical reason for it working the way it does. On the surface I think pion has a good point that it as it stands it doesn't seem intuitive, but perhaps changing the documentation might address this. BTW, I agree that the ratio trick would work with the default setup until someone looks at the log...
The really good news is nothing prevents trivial TCL scripts to adjust things any way you want
