I noticed that you said that you fixed the merchant bug by making people dc when they buy stackable items. That is a bad way to do it imo, there is another way to fix it so users can still buy stackable items in merchant.
I really think that it will be bad doing that because when people try to sell items like BUS, they will have to do a trade. It can be a hassle for some to just stand there and try to find someone that wants to buy. It can get pretty annoying.
But, it's your choice of course. This is just what I think.