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You say you loved SH3's crew management. Did you love the part where you have to keep moving the crew around yourself? SH4 has the crew organized into watch shifts, and they move themselves. You can also call them to Battle Stations and they will all come on duty. I think it is far better.
SH5 solves the problem by having no crew at all except for key officers.
If you really like SH3's the best then I would ignore the graphics you don't like and stick with that one. It still has the most development and the best mods.
[edit] Have a look around the forums. We do have complete forums dedicated to each game and to their mods.