Shield/Safety/Clean Slate scrolls. We need more choices to save and/or recover slots when scrolling our gear. I am am very grateful for both we receive per month in the reward shop, but realistically Maplestory 2 Mesos not enough when we have 100s of slots to scroll.
Right now, bots appear to conduct a monopoly on clean slates in game and sell them for 30m maplestory2 mesos a piece. I would love to see that the limitation in the reward store upped to 5 or so a month, or possess clean slates drop a great deal more frequently (perhaps from zak, hilla, etc) to get them down to 5-10m a bit.
Untradable equipment - mainly Android hubs, but also sweetwater equipment, etc.. As someone who makes most of my cash from kisses and sweetwater, I'd rather be broke and find something else to market as a way to trade these around my maplestory2 account. As of now, these can be the very last thing that I ever scroll/cube... assuming I ever get around to them! Even being able to sharing tag these items would be better than nothing.
I understand GMS is limited to what it can do, but Spell Traces have to be updated to reflect what regular scrolls can do. I do not mind weapons being stuck in 9, so they can earn money off Primes with Marvel, but Android hearts ought to also be in a position to have 9 assault! This wouldn't hurt the Prime marketplace, as min/maxers would still want them. As somebody who's likely considered middle class/mid game... These are the largest glaring defects to me.