Not a bad start at all, although they could sure use some stacks. Care to explain the comms setup?
Thanx
Exhausts are kept behind the side panels to increase sthealthiness. This is why you don't see any stacks. They can be seen from the top.
Other than the AEGIS systems, the systems were presented as symbols rather than the actual ones. The fleet defence destroyer mostly uses the systems of Alvaro de Bazan (F 100). The other two's systems are similar to those of Nansen class + 4 IFF transponder antennas. Fire control radars are similar to those on Halifax class I believe.
I cared more about the layout and weapon systems at this point: tried to keep as much weapon systems as possible inside the vessel so as to keep perturbations at a minimum. I used the VLS to the ultimate extent that I know.