And Salem has the absolute worst WR.
I'd never call the Salem underpowered. I'd say that most people probably don't realize that the Salem is all about that super-heal and the super-heal doesn't work if you take citadels or torpedoes. Salems are in fact seen in KOTS and in CB seasons where there are no carriers because of the specific things it does extremely well.
Petro is certainly good in randoms - no question. I would not call it "broken" in randoms. I would also not call Stalingrad "broken" in randoms even though it has the #1 WR.
Again, I'm not arguing here that the Petro isn't too good - I'm arguing that there is a fine line when it comes to balancing and that baby steps are often more appropriate than leaps.
FOR EXAMPLE: I wanted more than a 5% nerf to FDR plane HP I wanted a nerf to the TB's ability to turn 90 degrees and not lose accuracy.