I find RAI to be a far more entertaining way to play, not necessarily "better, and no we don't try to make certain units "better", we just don't allow things like Dreads moon walking into close combat in order to prevent someone from shooting it's ***. RAW can be taken advantage of just as easily as RAI can, we (my friends and I) just like to discuss what would make sense in a real life situation as it pulls us into the game. I have a very fluffy play group. I'm sure if we were tournie players we would like RAW more, but we prefer a route that helps "suck us into the game" so to speak.