i hope this will be a 'so subtle, you can slap it on every channel' plugin. for strong saturation, i use decapitator. for more subtle saturation, urs saturation. and i hope this plugin will work for saturation you hardly notice on a single track. you should be able to feel it more than hear it... until you hear what it does to 30 channels simultaneously, and are blown away.
as such, i can do without any filtering. of course it would be handy, but conceptually, it's part of a different plugin. like the new upcoming soundtoys eq, have you heard about that?
i just hope soundtoys take into account that not everybody is mixing towards 0dbfs, especially those looking for a better way to mix itb (which would also be the ones interested in a plugin i described above). personally, after reading another great thread here on gs, i've started to trim all the peaks on my channels down to -12dbfs. i really enjoy the headroom, but i already found that a few plugins that use level dependent saturation, (like psp squad) hardly add what they're supposed to add. so i hope soundtoys allow the user to set an operating level. (also for the metering, which i hope will be true vu)
i would probably put a trim plugin first on all my channels, followed by juice (or vcc) and then eq/comp of choice. of course, the trim plugin could also go second, removing the need for a selectable operating level. but i'd rather have juice work at any level.