It was rushed because they changed their decision, because it was leaked they were bringing him back. The findings didn't change, just the decision to bring him back.
Based on what was planned, it was clear they were bringing him back before the leak. They then had to somehow present the findings - which led them to plan to re-integrate, mean he should go to Getafe.
I struggle to see how the investigation and it's findings were particularly convincing (or if they were ever willing to share the details), if they u-turned so easily on them and refuse to go into any detail. My main point is I don't understand how the investigation details are going to be any use to INEOS, if United already deemed it meant he had to go to Getafe.
Well that's up to INEOS to check and decide, the club say they had access to witness statements, phone records etc plus did further enquiries beyond the police investigation. Sounds like a lot more evidence that can be assessed than some seem to suggest.
And i don't think they u-turned easily, seems clear that even Ten Hag was told that Greenwood was coming back.
They just clearly weren't prepared for the leak and subsequent backlash.
Obviously we have no idea what exactly was going on behind the scenes - what different options they looked at, why there was such a delay, when did they actually finish the investigation etc.
But we know Arnold has not survived and i think the handling of this situation will be a major reason for that.
So whatever happens from here it will be someone else making these decisions and surely they will learn a lot from the mistakes last summer.