Currently the container axes for carpet plots are autoranged with a fixed percentage buffer around all edges of the carpet area. But for large carpets this is too much, and for small carpets too little - titles can get clipped - see eg cheaterslope.png which isn't even autoranged, it's manually ranged more generously, but the titles are still cut off.

Figuring out a better autorange than this would require sizing and calculating positions for the text upfront, then using that to pad the containing axes.