Yes we do, particularly troop transports. There has never been a modern (i.e.post AOD subsim with satisfactory troopships:
AOD - Only two classes, both of which were identical (except one was longer and had two funnels).
SHI - Only one class, although very good looking.
SHII - Only two classes - Passenger Liner and Troop Transport. At least they were good models by SHII standards.
SHIII - Same as SHII, but the passenger liner looks like something from the 1950s.
I was also really disappionted by the tanker classes in SHII, and the Fast Transport looked like a modern cargo vessel. The Slow Cargo looked too boxy and modern, at least the bridge, but the Small Cargo was good (it is actually identical to the SHIII Small Merchant if you look closely, only less detailed of course). Freighter selection was better in AOD, SHI, and SHIII (although in SHIII we got too many mass-produced wartime freighters - generic vessels should have been used in place of the C2 and C3).
CCIP, I like your randomized parts idea, but I don't know if it would be workable. Also, it would interfere with the recognition book images. I don't think we can hope for something on that level. I would just hope for a better overall selection myself.