I really like the new gravity between bots(planet eater) feature ,its funny and could even give multibot an advantage to attract and catch prey.
There are probaly quite some effects unto swarms, on the one side swarms formations will tend to implode on the other side bots can drag other bots with them
for swarm movement.
However I am worried to many black holes will be created, objects without a chance of escape(although in some way thats funny :))
Well the black holes might eventually die when the predators succeed in eating all algae, but thats only possible if the are not hindered to much while eating.