It's basically a mid-side processor with a variable high-pass filter for the side channel. You can increase or decrease the stereo spread of a stereo signal while also making the signal mono below a chosen cutoff frequency.
There are some panning options, including dual pan and balance. Balance probably just changes the relative levels of left and right, while dual pan may move one side toward the other. For example, in balance mode, setting the pan control all the way left probably turns off the right channel. In dual pan mode, it probably moves the right channel completely to the left. I expect most DAWs could do these kinds of panning operations with the normal channel controls.
DAWs may have some kind of stereo width control, but the HPF on the side channel ("SAFE BASS") is a nice feature. Most DAWs can change the pan law. I don't know how useful the linear, log, sin/cos panning options are, except perhaps if you're automating active panning. The Fix MID and Bind M/S levels might affect how the panning works.
A plugin called TP Basslane does what the "safe bass" control does, but with the added benefit of being able to trim the level of the bass to compensate for differences in summing. If you have an EQ that can be applied to the mid channel, you can do the same thing. I find it's super helpful when you have a mix with a panned LF source, like a bass guitar.
