I like to think that the webcomic is where ONE lets his ideas out and then finishes or improves them in the manga well maybe not improve but changes it to something he thinks is better.
As someone who has read the web novel trust me when I say the build-up is worth it. Also, the arc after this one is a hundred times better so people have that to look forward to.
I wonder the same thing but I guess that's for the author to decide where the story goes. For now, we should enjoy the big-breasted women and see if a new girl would join and what race she would be.