I haven't really jumped into it but my first few minutes impression was: WOW.
I played the previous beta and this one seems to be much improved. You can actually hear the sound contact from the broadband station! In vanilla it was almost impossible to do this unless you use some sound mod.
I took the LADA for ASW hunt
The LADA now has a towed array! Though it can barely be seen from this screenshot.
New interface for the LADA broadband sonar station
New narrow band station for the LADA.