Why only 12 rounds? Granted on Wave 12 you need at least 3 people and it is challenging as you have to execute everyone. You get the feeling that this mode may have been tacked on at the last minute. I do love it though, being a beserker is awesome.
I would like to see a downloadable package for Lambent characters. I think it woul be cool using a Drudge mutation or the Lambent Zerker. Plus if you see yourself taking too much damage you can roll towards the COG's and explode.