Hmmm... I'm "old school" player so let's focus what is really important for me and another players like me !!!
0.24 : Simplified mission editor. <<< VERY IMPORTANT
0.25 : New water asset, all torpedo types. <<< VERY IMPORTANT
0.27 : New damage system for ships. <<< VERY IMPORTANT
0.31 : U-boat flooding and damage. <<< VERY IMPORTANT
0.34 : Playable corvette and Versus mode. <<< VERY IMPORTANT
0.29 : New AI, Aircraft. <<< IMPORTANT
0.28 : Global world map. <<< IMPORTANT
0.30 : New level editor with land/global location. <<<IMPORTANT
0.26 : Complete U-boat interior. <<< LOW INTEREST
0.33 : Dedicated servers. <<< LOW INTEREST
0.32 : New character models/character creator. <<< LOW INTEREST
Anyway, character creator may be quite interesting option.
Hope with save option to share your avatar-face on uboat.
