Any update? 

Awesome to see this being worked on again, this has been one of my main mods for a long time.The mod is officially being worked on again, the SR4 source leak has opened several new opportunities, such as restoring the cut takedowns that were missing their animations in retail version of the game.
Current version of the mod is being made from scratch again, taking into consideration everything i learnt and in some way i'm rebuilding the melee moves in melee.xbt from scratch, i still wouldn't expect a release soon but i'm playing around with the files to see what i can and can't do.
With that being said, here's some things i'm currently working on:
1. Saints Row 4 exclusive sprint takedowns (Rolling Neck Breaker, Head Scissors - with restored camera and Nutsack Ripper)
These currently lack audio in game, they might end up being optional in the released version.
2. Extra stomp animations (From SR1/2), they're slightly goofy but i think they're passable enough. There are now separate stomp animations if you're running (replaced with long kick) and right mouse button has unique long heavy stomp instead of sharing it with regular punch. The video only shows heavy stomp, more soon.
3. Restored charge spin animation, you can trigger it after landing a successful punch on an enemy and then pressing F (Testicular Assault button), this makes the player character spin and hit enemies.