Just to share of what I’ve learned after using inertialization:
- You can have multiple Innertialization nodes in the graph. they don’t really cost much, so I use one right after every blend space.
- If you use this node AFTER addative animations - you gonna have a bad time.
- If you use this node after ik nodes - you gonna have a bad time.
- It doesn’t work properly on sub graphs
Just like montages. - Does amazing job on start / stop animations, and transitioning from walk-run blendspace to idle state with single animation.
- Screw those jump start and jump end animations! rally!
Basically my idea was - slam one of those nodes at the end of the graph and it will work 
and after 2 days of debugging what causes bad ik and anim frame skipping… I realized there is no frame skipping, only IK and additive gives weird high velocities that ends up in terrible blends.