[Disclaimer: I know I'm not a BG regular, so please take anything I say here with a grain of salt.]
As part of a group with much more limited resources and a more niche community, I have a lot of envy for the situation at BG. A big beautiful store with excellent tables, great staff, gorgeous terrain, open late enough that any day is a viable game day, and all that. I can only speculate from my position, but in all of those things, I see a lot of opportunity as far as 40k is concerned. Speaking strictly from gameplay's side, I don't think it is a good idea to limit yourselves to what I've called "THE ONE TRUE GAME" approach. There's lots of ways to play 40k; there should be lots of ways to have events if you really want to take full advantage.
I learned a long time ago that if you try to put on the brakes and modify to please everyone you will fail (it's not possible to please everyone, period. Please the largest amount you can and move on). Having a definitive standard that you follow through on and reuse allows people to become familiar with the event style and the approach, and it becomes habitual.
More firm stances on required painting would probably cut back a lot on WAAC netlisting drama (not a hard requirement, but a lighter partial one would do the trick, just so that people can't just build the hot new list the week before and show up with an army of unfinished models or stinking of Simple Green). This would in turn clear up a lot of perceived negativity about "that guy" at tournaments and make the final score listing look less lopsided toward the power builds.
Also, the idea about limiting consecutive painting awards is a good one, there is already little motivation to bother painting up for a BG event if there is no requirement; even less when your effort would be wasted.
Most of you see me as a person who doesn't play at BG events, but I see myself more as a person who USED to, and wants to again. I have a club to deal with and rarely get to play at all, nevermind in an event. So BG events used to be my time off, I would like to see them have a resurgence so that I can have that back.