I think that it's also a good thing to have artwork of the things that have since changed. The pieces end up acting like photographs of how you've evolved along the way. They also act as a reminder whenever you're feeling stuck that you can look back on and see how far you've come - both in artistic style and as a person as well.
I have to wonder if this kind of thing comes in waves or whatever, because when I first Awakened, I was constantly discovering new things, changing names, changing what my form looked like... hell, even changing my true form's sex. But now, it's pretty stable. With the exception of the updated version of my wings that I made a few months ago, my true form pretty much looks the same as she has for around four years now.
I bet and that does become annoying though for me I still don't know much about my species other then with what I have found. Finding answers about your kintype is really frustrating and it doesn't make sense with what you already know.