Gigantica -- A Study in Maximum Habitable Planet Size

[MrBragg]

I don't have any advice on how to help things, but I do want to point out that your Koppen map doesn't seem to necessarily correspond to your temperature maps. Your northern summer map has >10 C temperatures extending well north of 30 N (up to ~45 N it seems in some places), though the Koppen map shows almost everything north of 30 degrees as ET/EF, which can't be the case if a month has an average >10 C (>0 C for EF!). Similar conditions exist in the south, if anything it's more prominent there with nearly all the land being >0 C in the winter. You may want to look into why this is as, if the temperature maps are correct, you'll have way more land with less hostile climates than you do now.

[Edit]: Also wanted to say thanks for posting all of this information. It interesting and really helpful to see how much the resolution affects the result that you're getting.

[Edit 2]: It also looks like your latitude scales are messed up in your most recent outputs as they start and end at 60 N/S even though the displayed maps seem to go from 90 N/S based on your previous posts, so something funny might be going on with whatever scripts you're using.