Hello, we are aware of the issue that players are currently having with this. We understand that the current system may reward players too much, and may be too fun for the players, so we will be lowering the drop rates in the future. We also plan to take out all Gate Legendary Duelists and make them only available by spawn, as we have heard complaints that the current system is too convenient.
At this moment we are not offering guns, but due to popular demand, we may consider this in the future. Note that this will be the final response to this question.
i think its a good idea to remove the LD from the gate. i would suggest removing their spawns as well, we should only be able to get cards through booster packs. Also remove the card trader. :)