For a more in-depth look at the new features in WorldEdit 7.4.x, check out this article

7.4.3:

• Updated to 26.1(.1/.2)
• Added a worldedit:random tree type to replicate legacy random tree functionality
• Improved error handling of invalid schematic paths
• Fixed //generatebiome not being possible to undo
• Fixed a few issues where odd permissions setups would not show friendly permissions error messages
• Fixed some incompatible selection commands not showing friendly error messages when used with convex selections
• Fixed some potential issues when creating extend region selectors via the API
• Improved accuracy of area calculations for poly2d selections in certain complex situations
• Made the directory watcher thread a daemon to resolve rare shutdown issues on specific hardware/software configurations
• [Bukkit] Improved incompatible version warnings from adapters to reduce chance of false positives in certain contexts