I work in live events and crowd management and there are a few noticeable things over the past 9 months since large-scale events have started again which will help manage expectations.
There has been a large scale loss of knowledge and experience within the industry, and whilst there might be documentation to tell people how to implement the operational plan on the ground experience will have gone. This can then be combined with a lot of new people to the industry and companies being stretched and sub-contracting beyond all belief, I had messages on Friday asking could I work / supply staff to do the Saturday and Sunday and I was being offered £11ph wanting me to then pay £9.50ph (making £18 profit per person for a 12 hour shift), thats for staff working as SIA's, no one in their right mind will accept that at the moment with large events at most cities where SIA staff are then working for the highest bidder.
People have forgotten what it's like being in a large crowd (People have generally forgotten how to act at events in general, people have just become D!cks over the past few years we had a brawl at a Diana Ross gig during her normal arena shows recently... like people need to chill out and just be more considerate, studying how people flow around a venue and stand watching a show there are subtle changes, people are wanting more space than in years gone by, on average a you'd be looking at around 4 - 5 people per square meter Max for a crowd being stood watching with about 4 people per meter being the accepted number for people moving in a crowd, most people now just don't want to be that close to each other which means crowds just take up more space than before.
Another aspect is recency bias within the fact its been 3 years since the last festival, most of the issues people felt this weekend would've been there last festival but we choose not to remember those parts, I've seen fights around Arcadia before, Cocaine being snorted for fun at the Pyramid and horrendous crowds, 2019 Pale Waves had a crazy crowd and I remember years back 1975 having a crazy crowd and the set being stopped because of a fight.
A lot of large festivals this year will have both a lot of remembering of how to do things for experience staff and then a whole new world for any staff working, there will be learnings for everyone and hopefully next year the improvements will be noticeable