Just musing, no clear idea yet. My experience with RW is still limited and then I thought to seek the advice of the more experienced.
1) The current biome implementation includes all biomes in each world, just go on enough in a direction and you cross each of them. This is nice to add variety to a single world and, in perspective, may allow for future relationships between different settlements in different biomes (desert settlements exporting dates and importing tomatoes...). OTOH, it possibly limits the possibility to expand a given civilisation which applies to a specific biome. It also seems to me biomes might have quite different sizes (not sure, but I got this impression by the time it takes to cross each one) and some seem smaller.
2) Would a single-biome world make sense? (for instance, the biome choice could be an option of the world creation dlg box)
3) Or would it make more sense to keep the multi-biome context, but making each bigger?
What do you think? Thanks, M.