Totally agree with this.Gorrin is criminally underrated on here by some. Yes, he's somewhat limited in possession, but he is one of, if not the, best defending midfielder in the league. His ability to make interceptions, blocks and just generally break up opposition attacks is brilliant, and we hugely missed him this season. 433 with overlapping full backs and two attacking midfielders works, but only if you have a very good holding midfielder like Gorrin.
Very hard to find replacement who can fulfil a similar role. Successful sides do not require 11 players on the pitch to be creative and forward thinking. You need players willing to sacrifice themselves for the team, plug gaps and spot danger. This is something Gorrin does very well- if he was also very good playing forward with the ball he would not be in league one.