1- What this game needs is flavor. As it stands, historical events come to a halt approximately 50 years into the game.
There aren't enough country specific/geographic decisions and mission trees.
2- Not much is being done on the modding front. There are a few active mods out there, but most seem abandoned.
I don't know the reason why. Perhaps it's because there are aspects of IR that are difficult to mod.
Mods are a huge reason for games' longevity, but it seems modders just aren't that interested in IR.