@perseverence I totally sympathise about you finding the process nerve wracking - you are by no means alone feeling this way 🤗
I've been through the process for O twice in the last 3 years - once for Geography, once for Modern Languages. Both applied for and received deferred offers. So if anyone has any queries on these subjects please ask / DM.
Re Pooling - I agree with PP that Oxofrd's system is fairer as you are actually interviewed again. With Geography unlike most subjects they don't tend to do second interviews. DC2 (ML) had a two interviews with one college the first week and a second interview a week later with two colleges attending that interview and was offered a place by one of the second colleges. Exactly the same happened to their friend applying for the same subject.
It was a well managed process though interestingly all the colleges had different styles with the online interviews - some you are straight in to the tutors and no warm up while with another college there was a welcome room with friendly undergrads checking you were okay, had your background blurred etc.
Having had one DC have face to face and one have online interviews I'd say the online interview process is fairer and has less bias. Heading to O or C by yourself and having to socialise with a whole load of other nervous people is quite stressful especially if you are not used to such ivory tower settings.
DC2s college had an offer holders day very shortly afterwards so they could see the college.
Re other choices . For info for ML 2021 application for 2023 place (DC2): Bristol offered in October, Durham in Feb, Newcastle in March/April , Edinburgh she gave up waiting for in mid May . Context Northern Comprehensive till GCSEs then State Grammar for 6th form - not a contextual candidate