Crimson Echoes: The Rebellion of Gremory (Highschool dxd)

I know that the story is slow, I meant for it to be a slow burn story( I think that is called). However one fan told me it was way to slow. So I wanted to ask, is it to slow? you guys like the speed it is now?

The timeline I have right is this:

Arc 1(Ch.1-30) childhood and memories

The main character growing up and learning a bit off the underworld..

Arc 2 (Ch. 31–60): Rias's Early Kuoh Years

Rias around 16, forming ORC with Akeno, Koneko, etc. Rivalries with Haruna, Rossweisse. The MC is absent from Kuoh.

Arc 3 (Ch. 61–90): The MC's Return, Freed/Raynare Arcs

MC also 16, moves to Kuoh, meets Issei, Freed, etc. Probably partial gear awakening near Ch. 80–90 maybe less.

Arc 4 (Ch. 91–120): Kokabiel, Excalibur, Early Harem

MC's gear established, comedic synergy with Issei. Rivalries ease.

Arc 5 (Ch. 121–160): Riser Phoenix Engagement

MC helps free Rias from forced marriage. Harem intensifies.

For some people it seems way to slow so I could lower the chapters and make it less detailed. Like I said I have the timeline made but I could hurry it up. By the way the timeline still goes on after arc 5 but still making the part after.