I think it will be a good idea to add more filters on Discovery. Splitting stocks by US and UK is okay for now but when Invest by Freetrade is launched, having these two main filters only will make it hard to skim through thousands of stocks.
Maybe we can add secondary filters by sectors? This article does a good job at explaining the different sectors (https://etfdb.com/etf-education/the-10-sectors-of-the-stock-market/ ).
Let me know what you think!