I don't really have many complaints tbh. Sure, Chrysolia Forest is annoying - but I love the music there, so it doesn't bother me too much. Same with Aventurine Forest. As for the diary, yeah I wouldn't do it in real life obviously, but... I didn't know that lots of people will be upset by this. I just thought of it as a simple procedure to continue with the storyline and nothing more/less.
The thing that bothers me the most is probably the lag (specifically in Route 2).