I do think the biomes are already quite serviceable for being this early in the process (although there is the issue of heat not being an issue), as most are likely expecting variety in fauna and flora to slowly expand along the main content.
What i'd like to see is simply larger terrain, as landform scale seem to only affect how vertical slopes toward high ground are. Wider plains, more treacherous mountains, etc.
Also a way to reliably see the result of worldgen settings (such as a simulated minimap to reload and see), as it was pretty hard to generate continents with connected waterways that aren't too wide (my best shot being 40% landcover 200% landcover scale) so that boats and mounts aren't mutually exclusive in utility.
