What purpose and use in the bulk of the game are you referring to? The M Jug was another gap filler one of the few for late war setups. It has no air to ground ability for fighting teh warz! So how does that help in the bulk aspect of the game?
Other than the die hard P-47 fans who fly the plane for the pure love of it. The Ms biggest use is by people who want to boom and zoom furballs with little or no chance of being killed. Pretty much what your average B-29 beggar wants. All the advantage and little chance of having to deal with the inconvenience of having to fight.
the M jug is not a "gap filler" it was the absolute APEX of the (service) P47 lineage, not having it would make as much sense as having every P51 except the D.
it its flown by more than Jug heads, because its a competitive ride, fast, good climb, good guns.
Ms biggest use is by people who want to boom and zoom furballs with little or no chance of being killedall 190s, K4, 51D, ... hell any plane that doesent compress before 500mph.. pot, kettle..
and the 29 would be used like any other bomber in the game.. to make things on the ground vanish, it would just be better at in than the rest.