Import into existing tables, and smarter handling of split files
Importing no longer always means new tables. Point a sheet at a table you already have, map its columns to existing fields (matched up for you), and nominate a column to match on so a re-import updates rows instead of duplicating them — blank cells never overwrite what's there. Several files with identical columns are now combined into one table instead of becoming one table each, which is what you want when an export arrives split by year or region. Large imports also no longer hit a size limit.