In fairness he thought he had. He appointed Koeman who had taken on Pochettino’s work at Southampton and actually done better, was a trophy winner in Europe and had a good record away at the top teams. He didn’t know that as soon as he arrived Koeman would just sack off on the golf course, preside over the worst transfer window in the history of the club and treat the whole thing as an audition for the Barcelona job.
The Koeman appointment made a lot of sense, and I do think they felt they were getting an Ancelotti esque manager in Koeman, who was experienced and able to manage the pressure and expectations well enough.
I mean it's easy to make big conclusions, as Koeman had started quite well, but even at this stage I had reservations over Koeman. He had already shifted his playing style radically from what he said he would do (and did at Spurs) and the performances at Watford, Burnley, Swansea etc were a bit red flag to me. This was within his first 12-13 games.
You look at Ancelotti, we got hammered at Chelsea (as did Koeman) but in the winnable games, in general we have played much better. We've not been outplayed and looked clueless in any of the games. He just feels much more confident and calm in the role that Koeman ever did. He also sounds like he wants to be here long term, which I never really felt from Koeman.
The logic was ok with Koeman. However it's also been suggested they wanted to bail on Koeman before they appointed him, but felt it was too late in. They should have listened to their gut feelings.