I think there could be a possibility for there being a MK2. If you have any suggestions as for the size of the MK2 feel free to say (1.5x, 2x bigger etc.). The bomb also only does just enough damage to break vanilla trees, so if modded trees have more health I could also increase it in the MK2.
As for a "rock breaking bomb", this one currently already does break rocks as well due to limitations in filtering.