An idea for the healing system in bedrock edition

In bedrock edition,player regenerates half a heart every four seconds which is so slow especially when I'm fighting with a wither.However,I can attack quickly so it's no need to heal as fast as Java edition.In my opinion,it's a great idea to use the healing system in Legacy Console Edition to bedrock.I mean,if you have saturation,you can regenerate half a heart every second.If you don't have any saturation,you still generate half a heart every four seconds.