With multitrack recorded drums it would be very common to process the individual tracks differently, yes. And using sends would be a way to sculpt the kick sound with a compressor setting you don't want applied to your cymbals, or add additional reverb to the snare you don't want on the rest of the kit, etc. (for examples.)
As you have discovered, using a multi track output VSTi in Mixcraft results in child tracks or lanes instead of individual tracks, limiting your ability to easily do this.
While there are workarounds, and hope that changes to come in Mixcraft 8 may improve this, keep in mind using EZDrummer/Superior drummer isn't exactly the same as using dry multitrack recordings. The sounds are generally "pre-processed" to some degree with the intention of getting close to the sound you desire before output to the DAW tracks, reducing or eliminating the need for the previously described processing.
Depending on your version, the VSTi can be used to manipulate this. I haven't personally used Superior, but from what I have seen in tutorials and overviews, it is made to be especially
flexible for tweaking to your individual tastes and desires in this manner.
However, while tedious- if you do still wish to break out the individual tracks you can cut/paste the midi line for say for example just the kick drum to a new track and use another incidence of the VSTi.
Trying to do it for every track however can quickly lead to computer resource issues due to the multiple instrument incidences, which defeats the purpose of a multi-output instrument in the first place.......
But you shouldn't really need to do that anyway.
If you do choose that path, maybe some of this content will help too: http://blog.acoustica.com/off-beaten-path/
Note that (depending on style and tastes) another common but possibly advanced trick is to add (for example) a kick sample timed with the original and blend the sounds for the desired result.