It'll be more exciting cause for the first time we will focus on story and plot more than be driven by power scaling to determine what will happen in future
Also cause Oda will not have to nerf opponents in illogical way like Big Mom just to prevent a disaster
Lastly cause Blackbeard has ability to surpass current yonko and nerf Luffy from his DF
And because Imu-sama potentially can be strongest ever being behind the shadows
So two characters are potentially still higher than Luffy will be confronted
Also cause Oda will not have to nerf opponents in illogical way like Big Mom just to prevent a disaster
Lastly cause Blackbeard has ability to surpass current yonko and nerf Luffy from his DF
And because Imu-sama potentially can be strongest ever being behind the shadows
So two characters are potentially still higher than Luffy will be confronted