Yes, I agree that the event was a bit unorganized. The afternoon sessions where you could choose between hearing about Policy Labs, Student Panels, etc. was the most frustrating part of the day. It was clear that they did not anticipate ~300 people there and staff seemed a bit overwhelmed, but everyone I interacted with was super nice and helpful. And I should also mention I've been satisfied with my communication with Harris.
I think they were aware of their quant-heavy image and everyone tried to play down those concerns. I mostly talked to first-year students; they were all really helpful in answering my questions. One thing I noticed was that current students could not stop raving about how much they enjoyed working with their classmates. It's definitely a positive thing, but I thought it was interesting how so many students emphasized that over other aspects of their program.
Ultimately, it seems like Harris is being responsive to student concerns and is trying to change things. Students seemed satisfied with the support they are getting from staff, but Harris seems very much in a transition phase. That can be really exciting or frustrating (or both!), depending on your perspective.
I really enjoyed my time at the Admit Day and loved spending time the following day exploring Hyde Park and the university, but ultimately I'm looking at the best funding options. They did say they would reconsider offers if you provide new information (other offers, updated transcripts, etc), so if you were disappointed by your offer I suggest reaching out!