Originally, Kamihime was very whale unfriendly. There's expensive stuff like SSR Books that you just don't have enough of if you start the game with all the SSR Kamihimes, even if you buy all the store offers for them. The Gacha Eidolons were (and for us still are) fairly crappy. And for a whale, there was like... nothing to do with the extra Dragon Eyes.

So slowly but surely, the game has been made more and more and more whale friendly. Like 100% Eidolons, or extremely expensive ways to spend Dragon Eyes (20 for these limit break things, or 15 for the non-KH weapons).