Im not worried about Japanese ships that the devs include as Im sure they will model all the important ones.
AI submarines and aircraft is what i would worry about.
Look at SH3, No AI subs at all - discraceful! Where are all the fantastic british S and T class subs?
They better have AI submarines this time round, I really want the chance to see and I-400 in my scope, lack of Ai subs In SHIV is a bit of a deal breaker for me. (when i say AI subs, I dont mean wolf packs)
And what of aircraft?
Ugly super low detailed models, very basic AI,
lack of variety in ordinance (where are the torpedos, rockets and cannons?)
And some incorrect aircraft types included! In SH3 we have the Hurricane and P38 lightning attacking Uboats
, whilst the most common ASW aircraft like the beaufighter, Hudson and mosquito were missing! This shows poor reserch, even SH2 did a better job in this department.
These are the things the devs are more lightly to fudge, so i would make a thread about AI Aircraft and subs to be included not ships.