If you haven't already done so, make sure you read the bits about the unit system in sections F and H of the Bartlett report, cause that's a huge part of y2 and 3... worryingly I personally couldn't find anything recent online about UCL improving anything specific about the course, just a generic 'we are shocked by the allegations and will take action' article from back in summer 2022 right after the report came out. if you do go to a UCL offer holder day make sure you know the report and drill em hard on what they've actually done in response, cause that's 3 years of your life at least you'll spend there
Maybe you could reach out to current Bartlett and Loughborough students on LinkedIn and get some firsthand (and hopefully unbiased) opinions on each uni and the course as well.
also out of curiosity - what bits of the Loughborough course didn't you like?