I suppose we would need to split the sunlight, into different wavelength types. That way we can have per patch composition of light, and then the different photosynthesis parts could use different wavelengths to have differing effectiveness in different parts.
So this would make the cell survive in colder environments? This would be related to: Environmental Tolerance Adaptations
Does this work currently like this in game? Or does it currently not allow front facing flagella to move the cell forwards? I have a feeling that it was like that at some point, but it may have changed.
I think it would make sense for injecting toxins to use up toxins in the player cell. And if there isn’t enough toxin to inject it would just deal reduced damage.
In a clean design, you wouldn’t really have exceptions. Instead you would have general purpose systems that support that variation. So far none of these sound like they need too much really specific functionality, though many of these depend on future features being done.