I have heard of many people getting in line for panels at 2am at Star Wars Celebration and then not getting in. I think I would just rather gamble up front then gamble my whole night away on a concrete floor. Also, at D23 Expo, they seem to sometimes screw up the lines and let late comers in before the people that camped out overnight in the basement, causing the campers to not get int.
Besides not getting into the SWGE panel, which was not a guarantee at all, even if you had waited in line, what has not worked with the lottery system? Sorry you missed the panel.