Wolf359 stated "For starters Posers layer system has NO ability to speed up, slow down, or even mirror the actor, or reorient the actors facing direction"

 

This is just plain out wrong.  It may not work in Poser 6 but it has worked in Poser Pro 2012 and 2014 and that is the retime animation.  I use it all the time to speed up and slow down movements.  I also have no problems bring in a BVH file making it turn 90 degrees to the right and having it work.  The biggest thing to know about BVH files is that all motion is reletive to the hip and all you have to do is realigne the hip xyz axis and tranlations. 

Prior to the latest SR4 for Poser 10 2014 and GD You could not turn off the IK and back on.  Now you can.  however in the example you  posted why could you not keep IK on and just move the feet to where you wanted them?  Also you stated two very diferent reasons, one for a stateboarder and a lawyer.  For one you would want very detailed boring actions that played in "Real Time", for the other to keep peoples attention you have to make it quick and snappy or you risk putting them to sleep.  No on really wants to watch some one walking for 15 seconds.  Or if you have to have the 15 seconds of walking then there should be different angles and points of interest.

 

 

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13