It’s not hard to “track” fire damage at all, because none of the ”specials” (except for dead observer) follows the plane anyway. They last for a set period of time, and since you draw fire damage at the start of a turn (when no one is shooting at you), it’s easy to grasp that only the number matters.
So your system is not making it easier at all.
Wounded Pilot and damaged engine both stick with you.
And it's not hard to track that stuff when you play one plane. But if you are flying multiple planes, you sometimes have to go back and look through damage to remember. At least, I do.