@Dale B when was the last time you tried #1?  Using the latest version PP2014GD I can now turn on and off IK place the foot at different locations and it mostly works as you would expect.  There is a small amount of movement but nothing that can not be fixed.  When you now turn off the IK for a foot or hand it creates key frames in the joints that were/are affected by the movement.  Just beaware that it is a forward only function, that is do not uncheck the IK then go to a point before that and try to turn on an IK in a different part.  Such as IK is on for the Feet do not turn it off at frame 80 and trying to go to frame 40 and turn on IK for the Hand, it appears to freak out the un-IK foot.  The Positive is that you now have graphs that you can fix re-align.

This also takes care of my wish to be able to tweek the IK and being able to see the graph.  Now as a further improvement would be able to see the graph without having to lock the movements in place.

More functions/features for the graph would be the ability to select and delete multiple keyframes.  That way you can hand clean BVH files by looking at the changes and making a human decision as to what is and is not important.  Along the same line it would be nice to be able to see multiple layers on the same graph so that if I was working on the xTran on the arm I could look at say the BVH layer and a new layer so that I could hand place key frames to try to match the key aspects to reduce clutter.  One other nice to have feature would be ablt to have three lines on the graph to represent the x,y,z trans or twist of a joint.  They could be Red Green and Blue much like the gimble ball.

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