Regarding Hostile Waters... nothing major other than some minor stuff. Like the base defences are a bit all over the place and kinda useless in their current locations, I was thinking would replacing (or adding?) the outer defences on the tiny icebergs with AA guns/SAMs on them? Right now the lone pillbox/flame tower on each side is laughable and can be completely ignored. If this was to happen, it'd mean it'd be worthwhile to bring capital ships/subs to allow helicopters in and thus cannot be ignored.
My major greivance with this map, however is that once your Barracks is gone, there is absolutely nothing you can do to re-take the middle, it's optional and probably intended, but it kinda sucks that your enemy is most likely going to have a huge advantage, which you can't do a single thing about it. Perhaps wrenches can be found in the crates or something??
Finally, would it be too much to ask for the map just be a tad little lighter? I find myself squinting really hard at times (if only Hinds/Longbows had spotlights!)
EDIT: I'm actually thinking that 30 minutes might be too short for this map, you rarely see anyone winning by base destruction... would making it 40 minutes be too much?