Hmmm. I feel like I may just be out of the loop, considering I haven't been active lately, but I'd honestly prefer it if the trades market was *expanded on* instead of balanced? But perhaps I'm not aware of what you mean by balancing it.
As it is now, massive swaths of items are almost always missing from the market itself because listing each item one by one can be time-consuming (I assume), AND everyone has a very limited amount of trades that are able to be posted w/o paying for more, which leads to users favoring NPC shop items that others haven't unlocked, etc etc. On top of having so few online users, trade posts can be really hard to move before they expire as well.
As it is, just getting a single item for say, pet affection is sometimes a NIGHTMARE. If nobody has it listed in trades? Get ready to drop upwards of 30k potatoes for a single item through gacha, which is infinitely frustrating and a large part in why I haven't really bothered much with this site lately, ngl.