So I sampled a clip in Iclone 7.3 and noticed that the curve editor (1.1) performance has dropped significantly. 
Selecting and deleting even a single keyframe now takes an age!

This makes the plugin impractical to use.
Feedback Tracker bug filed. Please vote or add to it if you've experienced the same. I'm gonna see if I can roll back.

Edit: My suspicion is that this maybe has something to do with the addition of animation compression. Sampled curve data now seems extremely dense, which I think is what's causing the slow down and not so much the curve editor changes (perhaps). Is it now REQUIRED that we add animation compression in order for this not to happen?