A temporary bonus for a creature combined with transform potion will result in an permanent bonus. For example: divine fury gives +3 atk for one turn, but when you use transform potion additionally the hp bonus will be permanently.
Furthermore, i don’t know if it is intended, when you have for example war drums and your creature get 0 atk, for instance by use of elemental bequest, you only have to move the creature to get the +1 atk bonus again, so that the creature has 1 atk.
I hope both explanations were comprehensible. :)