I think, that Ubisoft need made patch 1.6 for SHIII, so:
1 - SH III is best game in series
2 - SH III is best game for modding
And so in patch need made:
1 - support memory to 256 Gb
2 - support videomemory to 256 Gb
3 - delete limit planes in air (now 50 planes, if more so crash)
4 - made insert 200 submarine types (it is easy, so now all limited number submarine types for gamers) total
5 - made insert more flotillia (now see p.4)
6 - made insert other countries (like USSR, British, Poland, France, Japan for example). In new countryes made flotillias and few boats for gamers (more would be made community himself) and few AI ships like targets for subs this countryes (more wold be made by community himself)
7 - game not need connect with Internet for work
8 - made insert 200 (or more) weapon types for submarines, so would be submarines various states and need more weapon types
9 - insert normal homing torpedoes with realistic data. This data can see this:
http://sovpl.forum24.ru/?1-4-0-00000051-000-0-0
especially for german T-V torpedoes.
10 - not need insert in new patch US submarines, so in this case sell SH IV would be kill total
11 - may be more after.
And last - new patch with it launch new interes in Silent Hunter serie, so SH III receive new features. New features is new interest and new prosuct sell for company Ubisoft.