That's easily explained. Gods was a very good game at its time but the original release was almost 30 years ago.
The remaster only offers some touched up graphics (which you can switch to the original if you want) but otherwise claims to stay faithful to the original. While that might be considered good by fans of the original it also means that the game will have a lot of quirks that were considered normal 30 years ago. After all, game design, control schemes, etc. have improved a lot during that time.
Which means that today there are a lot of similar games that are far superior to Gods. Dust, Ori, Hollow Knight, Sundered, to name but a few from the last years, without even mentioning anything from the last 30 or so years.
If Gods Remastered were sufficiently cheap to cater to the crowd who would like another go at the game because of nostalgia or to the curious young ones who would like to try an old classic that would be fine. But they think they can sell this for €20.
I just can't see how that would sell when all of the above mentioned far superior new games cost the same or less than that.