Well, in Ship Pack 2 there are three other unused ships : one is an superb model of De Ruyter; an 11000ton passenger merchant (NKLCS_Heian), built upon and to resemble Akitsu Maru in it's original form; and light cruiser Oyodo. Only the last one was included in the original FOTRS (as far as I know).
Also, De Ruyter has
20mb skins.