I do think this comes off a little harsh, but in general I agree.
I would like to see more content with Pen soon, as much as I like Hazel I'm not interested in her romance so Pen seems the only other option for me, I think the author said something about twelve chapters? I could be wrong, but if that's true and there's been no real development with Pen so far then that's almost two books worth of content for the others and almost none for Pen, so his romance may feel a lot less focused on compared to the others :/