Having spent a lot of time doing station trading the last few years albeit at irregular frequency, I believe these changes are well-motivated but poorly thought-out, with insufficient data analysis, and even more insufficient insight and understanding. The double whammy of both (A) reducing pricing resolution to 4 significant digits and (B) introducing a massively expensive relisting charge for order changes is going to make our mostly illiquid markets even more illiquid and make trading less profitable.
It will do this by (1) interfering with price discovery (the market mechanism by which both buyers and sellers find an acceptable range of price points through which items can be traded at higher volumes and higher mutual acceptance of prevailing item prices), (2) increasing the spread between “bid” and “ask” prices needed in order for a trader to make a profit, and (3) probably reducing the number of station traders due to the increased difficulty of making round-trip profitable trades. The latter will hurt more casual market participants by making the markets less liquid through lowered presence and/or participation of station traders.
I agree that botters are an undesired aspect of current EVE markets in the five main trade hubs (Jita, Amarr, Dodixie, Hek, and Rens). However, making changes to game trade mechanisms that will significantly hurt legitimate, rule-following station traders is not the answer.
I’m sure that there are players that resent the presence of station traders because they may think they are making ISK that might otherwise go to non-station-trading players. However, such an attitude reflects a lack of understanding of how markets work, both within EVE and in real life. Efficient and “fair” pricing is in general best achieved by increasing the number of market participants, and high-volume traders (like station traders) usually help achieve this by improving price discovery and adding market liquidiity. Sure, a station trader may scalp 5%, 10%, or even much higher levels off the potential profit that the original item seller could have eventually achieved, but this is offset by the reduced waiting time that might otherwise be required to find a buyer. Trying to kill off station trading, whether intentional or not, will only hurt the game.
Of the two biggest changes being made here, the relisting charge I think is by far the worst. It seems to be based on the notion that most in-game items are traded by lots of botters, and that regular traders have few legitimate reasons to update orders. This premise is simply false. A very large percentage of items actually only have a relatively small number of active traders, most of whom I believe are not bots. Some items in Jita are so illiquid as to only have 1-2 buyers, and sometimes even none. The participation rate is even worse outside of Jita, even in the four other main market hubs. As someone who trades a lot of such items, often the main reason I change an order is to prevent it from expiring, and that’s with using 3-month buy/sell orders in most cases.
With a high relisting charge, I will likely have to reduce the number of items I trade in, and I expect a fair number of other traders will likely adopt a similar strategy. The reason for this is two-fold: (1) reduced profitability will make some items too risky to trade, and (2) to try to combat the effects of a relisting charge one useful strategy might be to place more but smaller orders in the same item. For example, switching from one buy-order to five buy-orders would allow one to stake out multiple price levels in the hope that at least some of them will eventually execute without having to change the bid, or only having to do so once or twice. Botters may try to adjust in this way as well in some cases, which means that creating a high relisting charge may not be as effective an anti-botting mechanism as EVE developers may think. Botters could use data-mining techniques to try to optimize order pricing changes and sizes in order to still gain an advantage over human traders.
I don’t know what the best way to combat botters is, but changing game mechanics in ways that will significantly hurt legitimate human traders and undermine market liquidity is not the answer.