The modifications are good, not so sure about the new bonus actions. Maybe some generic very minor bonus action combat moves would be fine.

Bonus Action: Feint? Sleight of Hand Check vs Perception check to gain Advantage on your next attack.

Bonus Action: Reckless? +2 attack, -4 AC.

Bonus Action: Defensive? +2 AC, -4 attack

But also, the magical heal from "Help" needs to go away. The situation where an enemy just repeatedly knocks someone out and you "help" them back up in an endless loop is ridiculous. That's what healing potions and healing spells are for. Having to use one of those needs to be a requirement to bring a downed character back in the fight.

Shoving something prone needs to simply be a variation of the Shove we already have. Except it needs to be an attack action.