PP power boost mod should be removed from the game, and FDL's price tag increased back to its original value. Boom, it's balanced again!
not relevant. If you were to completely combat fit both ships, best shields, best armor, SCBs, similar weapons. The FDL still comes out being significantly more expensive. You were manipulating the data there.
If you do this you also make the FDL too heavy.
Generally optimal combat configurations between the two vessels are not the same.
38T of extra mass on an FDL to less than double it's base hull integrity is not an economical use of mass budget for most setups. If you are in a shield oriented configuration, engineer yourself a nice 2D HRP and light weight alloys, save yourself 34T, and call it a day.
Think like a noob.