It seems that leaves change shape readily and some of the change triggers appear to be the level of available light as well as age / maturity of the plant. I noticed that the leaves of many of my GH located plants have changed over the course of the summer and leaf changes are also noticeable within the fig plant canopy with smaller plants that may be getting somewhat shaded by the leaves of taller plants in the course of the day, appearing to have more lobed / skinnier leaves (much more leaf edge area) versus those that are taller and receive more consistent light throughout the day (broader, fatter leaves, less lobing). Others, on the other hand, have noted that fig leaves in some cases were getting very large in response to diminishing light... almost as if to maximize the surface exposer to the diminishing light and therefore maximize photosynthesis. Not enough data for me to draw any conclusions or even identify a consistent pattern.... just an in progress observation....