You want to be able to block while sprinting, and for the unrealistic jump to be made more useful in combat? In my opinion jumping shouldn't be effective in combat at all, the only good reason for it being in the game is so the player can get over small obstructions. As it is, the jump allows players to jump higher than they would be able to in real life, and perform an attack, and their legs don't have a hit box while jumping either so they are harder to kill. I mean no offence, but I really think those ideas would be bad for the game Mongoose.