I ran FirstBot last night for a laugh. Field size 4, veg repop 175, veg starting nrg 5000, mutation rate 1000. I have about 5 different varients running around each with a dozen or so bots per species.
Im suprised I havnt got any gene splits or duplicates at all. I did get an increase in nrg required for reproduction via *.nrg 20000 > being duplicated and the > changing to a !%=, effectively increasing the nrg needed to 22000.
Also 10 .up store changed to 10 rnd .up store, presumably reducing the nrg required to accelerate when tied to babies/bumping veg. Maybe once its built up some junk and a few surplus store commands it will start to do interesting stuff.