The decision to rebuild the decommissioned Mississippi-class pre-dreadnoughts is a very strange one, since the Greeks are one of the only nations that start with pre-dreadnought hulls unlocked. Yet rather than getting relatively-accurate hulls, they end up launching as this (visual mods only):
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1.) As mentioned originally, the Greeks start with pre-dreadnought hulls. It doesn't make sense for their pre-dreadnoughts to build as regular battleships, particularly since as intact hulls these two ships would probably be pretty fast to rebuild.
2.) The guns don't exactly match; four 12-inch guns on the pre-dreadnought hull are now represented as being better-armed than almost every dreadnought in the game, only excluding the Colorado and Nagato-class battleships with eight 16-inch guns.
3.) Tech-2 armor is particularly strange for a ship with a 9-inch armor belt; that's battlecruiser levels of armor protection (the only dreadnought in-game with less armor is the Spanish España class, at 8-inches).
The only other note is that both the Mississippi-class and the Salamis-class are queued without names matching the Greek battleship namelist, resulting in the battleships having name duplicates if rebuilt (and being the only ships lacking the RHS prefix).