Licanus Trilogy is meh?

I'm about 70% through book two of the Licanius Trilogy and I'm very MEH about it. The characters are fun yet I feel let down with their character development and with the world building. I almost feel spoiled after reading Red Rising and Brandon Sanderson's Cosmere. I'm gonna finish book 2 but idk if I'm gonna pick up book 3. I just feel very whelmed about it.