Comparing NESing and IOT is comparing apples to oranges.
They're both fruit (community games). But they cannot be directly compared. (Well duh, apple's skin is more edible than an orange's skin. Of course the NESing community is older.)
Here's my challenge: Prove that there is more strategy in the average IOT than in the average NES; with the proof being the average length of war orders seen here: NESing orders
compared to here: IOT
The first Iron and Blood is a good example of what you are looking for. Of course that game was more of an exception than a rule. Son's Red Alert game had potential, but it didn't last all that long.
I play both and enjoy both.