Excellent post actually, not a whine at all, just an articulate, and well thought out critisism.
Obviously it will probably not stay this way exactly, although i\'m sure they will keep limits on ores, and objects, for immersion, and balance. (not very realistic to carry 1000 ore of any type on your back, and it was a bit too easy to make money.)
It just doesnt make sense in it\'s current (10 stack limit per ore) version. I am assuming the limit is based on a realistic weight limit a char would be able to carry. Gold, Iron, Platinum, and Coal, are all of different weights. Platinum although more pricey, is far lighter than gold. Someone who can carry 10 gold ores (if you insist on using \"ore\") could carry 15 or 20 platinum ores, and perhaps 50 coals to have an equivalent weight. Of the mineable materials in the game, Iron is the only metal that is actually mined in an \"ore\" form.
Gold is mined mostly raw, with other minerals mixed in to a slight degree, but when you mine a vein of gold your getting high content, same with platinum and coal. So the values of these should be a bit higher.
Other metals, and precious materials should be in the game as well. Giving us the ability to mine them based on what level our mining is at. Iron and coal should be lvl 1, silver, copper, and gold should be level two(note the two new metals there). Platinum level three. Perhaps we could get into some gems above those levels.
Currently we can mine anything with excellent proficiency simply by training one stinking level. That created a huge impbalance in the game. With the system outlined above, a player would have to mine like hell on coal and iron to be able to mine silver and gold, and copper. Training level two would be more expensive per point, so mining a good amount of gold, copper, and silver would be required to get you to level 3.
And I wholeheartedly agree that mining, and farming rats is a pretty weak form of economy. Tefusangs drop teeth, but they are much harder to kill. Rogues and Goblins, that we are seeing a lot more of in the sewers lately should be dropping cash and weapons, and their exp should be adjusted. Currently they award 10 exp a piece down there, but that\'s besides the point. Trepors could be dropping parts of their exoskeleton to be used as armor, etc.
Edit: you could also make the amount you carry, loosely variable by base stats. Strenght, and Endurace. And the success rate loosely based on intelligence, wisdom, etc.