I don't think anyone expected book 4 to be on par with book 2 or 3—but considering the original material they had, & had to work with (Korra being an insufferable bitch, the convoluted, & contradicting mess that the sequel is, &c), I think they made a quite decent, more than decent job at making Korra quite likable, at least on the Love Route. Surely, one can criticise the long delay/hiatus/questionable actions the writer/coder did last year but I think the last updates remedied it, and I really appreciate that book 4's Love Route is less grindy than the previous ones. (No Moose Lions to hunt, no earth benders to beat, no girls to save from the maze beneath Lake Laogai, and most importantly, no crab games to win.)
I still think this game is one of the best if not the best you can download on this website, at least from “amateurish” developers. — Really, did you expect that anything would top the masterpiece that book 2 is?