Yeah, the game was actually meant to end a lot earlier, but so many people wanted me to continue it. I sadly ran out of ideas towards the end, hence the rather rushed ending. I do agree that more needed to be done. It's why I felt it deserved a remake, that and being the first game I fully completed, it has a special place in my heart.
Other GTS games that are similar would be NyaGato's Goddess Training Games (1 and 2 especially), HironoGiro's Goddess Ascension is another. They are ones I liked a lot. Other than that, GiantessCity has a ton to check out, with varying stories and types.