Considering all the little things that seem to be difficult to implement already, I wouldn't doubt it'd be an undertaking. Though, now that I actually think on it more, I do notice all the little nuances such as taking into account the durations of DoTs for applying the correct potency so it'd stay competitive with Contagion. I suppose they could also give Ifrit a Fester-like buff where he does more AA and/or skill damage depending on the amount of DoTs applied to the enemy. SE needs to do something, especially with more Summons coming down the line.