After playing the game for sometime now and have found that the Islands them selves are getting too easy so I would like to see more walrus with anti aircraft weapons, weak Islands with walrus's with lasers normal Islands with quads strong and very strong with flak and deadly with missiles it makes sense because most of us use manta's when attacking the Island's to begin with and I never see any walrus's on Island's defending with these weapons.
Also shield boosters, scramblers and firewalls with some sort of shield (but allowing walrus's to pass through it to hack them if you wish) round them their selves because its to easy to just take them out with something like three rockets.