The continual feedback from modplayers to moddevelopers, is why a lot of mods are more fun and keep played longer than a lot of profesional developed games. Simply aproach every whine on a constructive manner. Is it a observation of a general problem or just an inexperienced player? Don't dismiss every suggestion just because it looks stupid at first or looks like a lot of work.
And on the topic of stupid suggestions. I noticed the little bit about aliens infesting dead marines and running around with their bodies has been removed. Does that mean you're going to try it?