I love my P47s, I was really worried since they get a terrible name in the forums when I was buying them. They require very careful play but are excellent at making things dead.
Things you can't do in a P47
1) Climb. Unfortunately, a Slinky will go up stairs about as fast as a P47 climbs.
2) Dive quickly. Unfortunately the P47 accelerates slowly in a dive, it does have a good top speed though.
3) Take hits, its a US fighter, you get shot in the tail and you die, nothing new here.
4) Turn. It does turn better than a heavy bomber.. not by much.. but it does.
Things you can do well in a P47
1) Kill fighters
2) Kill bombers
3) Kill ground
This thing puts out more reliable firepower than anything else (non premium) until the corsair C in the USA lineup. Yes I know the cobra's 37MM cannon is brutal when it works, but it is far from reliable given the cannon's cone of fire and wonky hit registration(hitting the same fighter 5 times and having 0 damage be dealt). It is also the first plane to be able to use the API-T tracer rack, unlike earlier tracer racks which are something like T/T/T/T/T/I-T, it fires nothing but API-T rounds which 1) Make it very clear exactly where you are aiming, letting you correct as you shoot 2) Deal substantial damage while doing it. Some will also freak out when they see 8x full tracer rounds being fired at them and they pull some silly maneuvers.
The combination of that and it having 8 machine guns vs the 4-6 of most planes below it mean it is great for killing fighters quickly, decent for killing pilots, and its high ammo count lets you kill bomber engines easily.