New Direction?

Ive been working hard on this game and ive come to a cross roads. the original story of the game has proven to cause problems with development being really complicated. causing troubles for me considering i am a solo developer with limited experience. so i was thinking about starting over, not completely, im still gonna have the same character controller and gunplay, but i came up with a new story and gameplay idea that is smaller scale and can prove to be more fun than what i was originally creating. something of a wave based shooter like cod zombies, but with boomer shooter gunplay. Thoughts?