I have 2 basic suggestions that could improve spiral knights. The first is heat for crowns, once all equipped armor has reached the level 10 the heat at the end of each level will be transferred into a small amount of crowns, not a lot but a few.
The second suggestion is a safe trade feature. For example, say I want a another person to craft me an item, you give the person the materials, money, and crystal energy in the trade window. since they have the recipe and the materials are in the trade box all requirements are met and they should be able to craft your item and put it into the trade box then you both accept trade. If someone cancels the item would be destroyed and the person with the materials would get their stuff back. without this system they can run away with your stuff and you could ban them but this way is easier.
1. i once suggested that and i regret it... the reason behind it is one word: Inflation. more crowns being pumped into the economy the more prices rise
2. the point of this game for you to do that yourself and not to rely on others to do your work even if you have all the materials other than the recipe