Both of your requests are actually already in-game! Mob explosion is a feature called “Overkill” and has a chance to trigger when the final blow on a monster deals significant damage. Each damage type will have its own overkill type, but for now only physical is present. Hit very hard, and sometimes you’ll see them explode in a shower of guts and blood.
Camera shake is also present, but not always noticeable with standard attacks. You can increase the strength of CamShake in the game’s options menu.