Wither Effected Mobs/Players Weak To Fire

As many people know, undead enemies both in Minecraft and not are usually weaker against fire. In Minecraft undead monsters such as skeletons and zombies burn up in the sun, and why stop there? By adding an additional element to the wither effect, players or mobs that currently have the wither effect would also be able to take more damage due to fire related damage. On top of that I think it would be a neat feature to have players with the wither effect burn up in the sunlight unless wearing a helmet just like the undead mobs as they are withering away sort of similarly to an undead mob. I think this added feature would be a really cool add on to the wither effect as it gives you very similar characteristics to the undead mobs in the game(skeletons/zombies). Just a thought I had that I think would add a tiny bit to the game, but all in all thanks.