I knew this would happen. This is the 2nd longest PC update in history (sic!) and with most animations (even more than in the biggest update, which was the previous one). The problem here is that most people here are interested in Hana only (and to a lesser degree in Mina) so if the rest doesn't interest you then yeah, it can be short. But devs have been open about it from the start, TD has in several places emphasised it:
https://f95zone.to/threads/pale-carnations-ch-4-up-6-ea-mutt-jeff.50281/post-18185600
That was me and I stand by it. There are tons of things to do in this update, the story is unfolding in a very enjoyable way and we get to know some interesting characters better. If you check out the memories section you will see that you have 9 scenes to unlock but these are not all sex/spicy scenes that we can see in this update.
You don't have to open the script to know you've missed a lot of content. I'm sure that those guys haven't seen all the scenes when they've written "it's short".
Anyway, this is how a proper visual novel should look like, otherwise it would be a kinetic novel and personally I hate these. If someone really wants it he can unren the game and watch all the images and animations that way or unlock the scenes via console or a script.