The market takes care of that via supply/demand. People will only pay listing prices they are willing to pay. Listing deposit has zero factor from the purchasers perspective.
The only people I am aware of that don't like this change are people trying to undercut other listers by a small amount on high value items, knowing that the penalty to cancel and relist protects them for the listing period of their competition. You can no longer do that effectively, and frankly it was cheeze to do so to begin with.
Adapt, or leave the sellers market IMO. There is no QQing in baseball, or GTN merchandising in SWTOR.
First off, your assumptions about what I'm doing on the market are wrong. Secondly, it's rather obnoxious to suggest someone leave and QQ because they have a different opinion than yours. If you don't want to read other opinions, consider starting your own blog.