to make some improvements to ns2 they should:

>remove the emergency light when the power gets cut off and replace it with a single pulsating red light to make it more freaky.

>possibly make it so your able to customise your marine.

>make the mechs and onos a bit more expensive so you dont have like 5 storming your base 5-10 mins into the game.

>if they get time ad an offline mode which has bots to fight so newbies can test out each of the races and commanders before going online.

>the alien base should not be lit up apart from by the buildings they have places which emit light.

>allow each side a few more defences in each area because marines only have turrets and only 3 of them and are pretty useless.

>allow marines to place small lights arround the place instead of having to power the entire room for light.

>add a medic to the marines or a gun which heals marines.

i really love ns2 but find some stuff a bit annoying. its a great game and am proud to own it dont get me wrong but these are a couple of idead i have that could improve it a bit.
if anyone else has any idead post below :)