I'm just giving my honest opinion. He's a coach that imo was very fortunate to come into the EPL at a time when the league was no where near as strong as it is now, when it comes to closing off space. And he was brought to Soton by Les Reed who had spotted Poch whilst keeping a watch on young Coutinho who was on loan to Espanyol. Reed wanted to bring in a coach to replace Nigel Adkins and saw Poch and his high energy style as the natural evolution from the football played under Adkins. But his football for me is too geared up for off the ball pressing and his teams have never shown the ability in the build up phase consistently at a high level in comparison to Enrique or ten Hag, who are two coaches who I would describe as being considerably superior than Poch at implementing a possession game style that has a real purpose and is easily identifiable. But that doesn't mean both coaches would be a success at United because I know good coaches can fail in the process of implementing their ways if the results aren't there.
And he did a decent job at Spurs but he was also culpable at the end imo, because when he arrived at Spurs, they had a DoF model with Franco Baldini. And Poch and Levy abandoned that model to give Poch total control as the Manager. And he finally lost his job because juggling the training ground duties with recruitment was very difficult at a time when the level of coaching in the league was on the rise with the arrival of several high caliber coaches. Klopp in contrast went to Liverpool as the Manager but realised his role as the head coach and embraced their recruitment department at a time when that department was getting widely ridiculed according to reports. Now Spurs have gone back to the DoF model again.