I was never too fond of turning Sonic into glowing ball that doesn't look like it could actually contain the character. Turning Sonic into a solid ball sells the idea that he is spinning so fast you can't quite make out the details on him. Lost World in general makes good use of the principles of animation, and I do like how he is animated in that game. I need to stress that it doesn't matter much to me if the new Ball model changes combat animations. 
I would appreciate it a whole lot of a skilled modder takes on this request.
It should be useful to also upload the assets separately from the Sonic pac file, just so one can use these assets in other character model mods. 

Thank you, have a good day.

Requirements

In order to receive the points bounty, you should fulfil the following requirements.

1. Sonic Lost World Jump-Ball model replaces the one from Frontiers.
2. The Ball is scaled properly and has the same proportions from Lost World.
3. The Ball has to spin and can't be static. Squash and stretch from the original game is preferable but not mandatory.
4. The Spindash has to stretch into an ellipse similar to LW or base Frontiers

Files

Alternate File Sources