There's a standard, universally loved template, 6lm, regarding what can be banned in the editor. Does anyone really want to explain to everyone during a game that they banned the market in the editor? People want to play a standard, built-in template that is optimized.
Changing the value in the GSC (Global Skill Cost) seems like the simplest solution. Are there any suggestions for what value would make the object no longer problematic? It seems to me that its imbalance isn't so extreme, and with a sufficiently high value (probably closer to the values of treasure objects), it could look normal.