I completely agree about the narratives pacing being completely off.
The story constantly jumps places,it often feels like complete scenes are missing(like the earth interlude for example,or parts of the introduction even).
Characters go far too fast from 0% to 100%(the only character that has some time spend on her is 18 and even there it feels like its missing quite a few steps,hell it just completely seems to ignore Bulma suddenly going down on the MC despite their whole relationship progression being a rather lovey dovey afair prior).
MC portrayal as well is rather flunky.
On the one hand the game normally offers you moral choices on how to go about your godly business(which is good)but then just out of nowhere MC suddenly decides to take Videl prisoner(which is a genuine what the hell moment).
If the MC doesnt turn out to be a complete and utter bastard that just pretends to be nice,pretty much invalidating all your prior approach choice,this feels really inconsistent(not to mention it kind of puts his harem at risk which feels like a stupid decision to make).
I get the point of quickly trying to push out sexual content but character interactions and development are the whole appeal of these things so if you just speed through them it will lead to a rather shallow and unsatisfying endproduct(especially if the mission statement of the game focusing on a smaller but more customizable cast is still true).
Having said that,the intital concept is really good and offers great potential.
With some(or rather a complete,as damning as that may sound)overhaul of the script this could turn into something really special but as it stands its just good(if not particularly close to the original)art and a smart setup wasted on a rather incoherent and patchworky narrative.