i'd like to chime in and say i too am very disapointed in the promootional weekend also and they way it being handled.
i likelon and thinkit quite fun and even bought a booster to register for tournament play.
but i have to agreee with everyone else i dont see any significant increase in drop rates either. only time i ever looted a booster was two days after lon went live and was lucky that it just wasn't a booster but a starter deck with two boosters! and was just farming for plat for my character to bu a mount. and fri and saturday was on the 12 hours each day and hundreds of chests later you'd think i would have gotten at least one drop! but on the bright side i did make a little over 20 plat in loot 
on thing is for to help relieve some of the fustration. what the heck are the drop rates normaly and what did you increase them too?? i hope it wasn't like 1 in 1000 chests increased significantly to 1 in 999.