Hi! Thank you so much for your lovely words, and for playing the game! I'm very happy that you enjoyed it and that it resonated with you. :)
As for the epilogue, I totally get where you're coming from. It's purpose in the narrative is more of a side-story thing that gives you a little glimpse of things to come (as well as some more time spent with Vol), which is why it's not called an Act like the other routes. But playing it in a vacuum, and expecting it to continue Astrid's story even further, I can definitely understand how you'd feel that way (and I suppose it may be evident that the epilogue was added as new content to the game, and wasn't originally part of the story).
Thanks for letting me know, and have a great day! :D <3