I wouldn't say it was a poor decision, don't beat yourself up. I think in this case its a matter of preference. I play almost exclusively druids, so I prefer the big open zones that don't benefit from LOS much. Small indoor dungeons give me the willies. Plus, a good amount of Emu users are on Winblows, and can't/don't want to try a real OS!
However, I am sure there are many other server ops who share your opinion and would like LOS to return false when no maps are loaded to prevent from getting 50 mob pile ups in dungeons. How about this, it may be more work but what if you impliment both? Maybe you can set it up as a variable in the database. Simply, LOS true or false. Just an idea.