Axel - Overwatch Fan Hero Concept

So, this is my idea of Finnish omnic hero for Overwatch.
Character has 'heat' system. Some abilities produce heat and some use it. Heat goes down slowly. Max heat is overheat mode.

Left click - disc shooter. Exploding disc projectiles.
Right click - flamethrower. Uses heat.
Left shift - accelerator. Gives speed boost and can run on walls. Produces heat. Unusable when in overheat.
E - Fireball. Shoots big fireball. Only usable in overheat and uses all heat.
Ultimate - Tornado. Axel runs in circle and causes a tornado that acts similiar to Zarya's graviton surge. Gives overheat.