A lot of that is being worked on, but it takes time.
There are plenty of groundbreaking Mods released for SH5 already.
Check out TDW IRAI Mod for example the AI has gone of the charts compared to stock.
Also his latest UI Mod includes a new feature called AUTOMATION check it out on his thread.
Steelviking And Bigreg have done wonders with the Interior of the sub and have some excellent exterior effects in there Mods.
I hope to be releasing my next version of my HiDef Realism mod soon also.