Thanks for the praise, it's much appreciated by all of us over at tUGS and motivates us to keep up what we're doing.
Have you read
the article Gorkamunda?
Or did you mean the other way around, putting Orks in Necromunda?
When we're working on rules we try to always remember that the most important thing is that the finished product has to be fun. This is carried over to when we're playing - we play to enjoy ourselves, not simply to win, so as long as lines of sight are about right, it's fine. When I think about it, most of the time we find cover grants -2 to hit, although occasionally there's light cover but it's very much in the minority.